Talk:Extraterrestrial life/Archive 2

Fact: no extrateresstial life found
I took off some apparent vandalism: "Aliens have been found hovering over the skies of africa, asia, and europe. They have attacked about 10 people and are on their way to australia..."

I missed a simple statement right at the beginning that until today there has been no scientific proof for et-life. Better also add the fact that some extreme local life forms found can be traced back to earth-life. What is the purpose of the whole article if it doesn't state anywhere if the topic has been found or not. Crass Spektakel (talk) 08:42, 17 June 2011 (UTC)


 * The third sentence addresses this: It is currently unknown whether any such forms of life exist or ever existed. Barnabypage (talk) 11:20, 17 June 2011 (UTC)

I added this back in, I think it's important. Kaspuhler (talk) 21:09, 18 July 2011 (UTC)kaspuhler


 * Actually NASA found alien bacteria fossils in one martian rock they have found.Well that was one proof but not so big at all.  — Preceding unsigned comment added by Elaizaleen (talk • contribs) 11:27, 15 February 2012 (UTC)


 * Unlikely. Please provide a link.  Rwessel (talk) 23:50, 15 February 2012 (UTC)


 * You must be referring to the ALH84001 meteorite, and the scientific consensus is that there was no bacterial fossils in it. Cheers, BatteryIncluded (talk) 16:29, 21 February 2012 (UTC)

Extraterrestrial life isn't necessarily the only thing called aliens y'know. Humanity are aliens. Alien is not a race is a description of something of an unknown origin, with an unknown cultural and unknown name. So I think alien should be removed as a second name. Because it looks like it points out that humans in this sentence "It is often also referred to as alien life, or simply aliens (or space aliens, to differentiate from other definitions of alien or aliens). These hypothetical forms of life range from simple bacteria-like organisms to beings far more complex than humans." are hypothecial forms and that we are bacteria-like organisms.--03:51, 3 March 2013 (UTC) — Preceding unsigned comment added by 58.164.136.30 (talk)


 * ALH84001 reserach remains inconclusive, albeit the evidence so far leans heavily to a biogenic explaination. That is very different from "no fossils", it means "looks like fossils, but we are not entirely sure". In addition to that there is the paper from Richard Hoover, from which NASA distanced itself. He was ridiculed in the media but i have still to come across a study wich conclusivly dismissed the points raised by Hoover. In addition to that there is the spectroscopy research on cosmic dust by Hoyle and Wickramasinghe, that latter recently working together with Hoover to produce the highly controversal paper on the Polonaruwa meteorite. Then there is the work of Gilbert Levin, the engineer deigning the Labled Release Experiment for the Viking probes, who, to this day, remains convinced the gathered data points to an active metabolism in martian soil. These claims have only been bolstered in the recent years, namely by discovering that Mars possesed a magnetic field in ancient times, as well as recently the indentivication of ancient riverbeds by the Curiosity rover. Even NASA now officially proclaimed Mars being a habitable world in the past - habitable in the meaning as habitable for humans, not unlike Earth today. In addition to that the findings that certain microbes can survive space conditions during tests performed abourd the ISS and possibly remain viable for billions of years, potentially being capable to reach other star systems in VIABLE form are staggering, to say at least. All subsequent studies, such as impact and reentry tests suppotrt this scenario. Albeit all those claims are not totally conclusive evidence is mounting in favour of a biosphere exceeding planetary, if not solar boundaries. Fossilized filament mats with carbonate cores are very hard to explain by abiotic causes. So arguably, depending on your position in this debate, there IS evidence. The question is merely if there is ENOUGH evidence to cause a paradigm shift.

217.89.117.154 (talk) 09:18, 18 April 2013 (UTC)

Arsenic-based life in Mono Lake, US
Recent discovery of arsenic-based life in Mono Lake, US; suggests an earth-based life form inconsisent with other forms of life - a possible "life 2.0" candidate. Apologies for lack of formatting.


 * There's been no such claim. ALL life as we know it has been based on carbon. HammerFilmFan (talk) 23:04, 4 September 2012 (UTC)

Found it! check this link Dunkleosteus77 (talk) 17:56, 10 April 2015 (UTC)

Why is this article very long?

 * Why not? It isn't that long compared to some other articles, and I'm not aware of any guideline saying "keep it short just to keep it short."  Also, could you please leave more of a message than a new section title and sign your posts with four tidles ( ~ )? Ian.thomson (talk) 00:37, 30 March 2010 (UTC)
 * A long article for an important subject. It fits. --Againme (talk) 21:18, 5 May 2010 (UTC)

"Although no samples have been found"
What about that news conference when Bill Clinton was president? They found bacteria samples that were from Mars, didn't they? That seems like a sample. &mdash; Timneu22 · talk 12:08, 3 May 2010 (UTC)
 * I think you are refering to the Allan Hills 84001 meteorite. I'll edit the article so the reflect this. --Againme (talk) 16:01, 3 May 2010 (UTC)

They found stuff that might be alive (and also may have been of terrestrial origin) on a meteor from Mars. Whereas it is an intriguing sample you cannot call it a sample of extraterrestrial life until A LOT of testing is done (ie they won't ever confirm this one way or another). -kaspuhler — Preceding unsigned comment added by Kaspuhler (talk • contribs) 21:02, 18 July 2011 (UTC)

Lede image change requested
Is it possible to find a better image for the lede; one that illustrates the subject more clearly than a postage stamp? All is One (talk) 16:30, 28 May 2010 (UTC)


 * It might be that wikimedia commons hasn't a better image to represent the subject. I was surprised when I clicked on the image, that many wikis in other languages also use it. You can always propose a new one although I do like this image and its somewhat abstract representation of ET life. GaussianCopula (talk) 07:12, 29 May 2010 (UTC)


 * Yeah...the stamp pic is a little lame. SolarWind123 —Preceding unsigned comment added by SolarWind123 (talk • contribs) 21:39, 26 June 2010 (UTC)


 * About us not transmitting anything into deep space -- we do! We beam sounds and ligh pulses into deep space. The line about us not doing so is just plain wrong. —Preceding unsigned comment added by 121.127.201.138 (talk) 06:26, 21 July 2010 (UTC)


 * Plain wrong is an incorrect term. You should use the term "without exotic ingredients wrong" instead.96.49.102.179 (talk) 14:47, 23 October 2010 (UTC)


 * Agreed. A much better photo could be used for this page... Especially for a topic as huge as this one.  (User: Daniellelynettehardy)  —Preceding undated comment added 14:19, 28 September 2011 (UTC).

✅! I've removed the fantasy Soviet stamp image and replaced it with a montage that's a visual summary of the current government/science consensus (no evidence yet) and the three major efforts in the search as outlined in the White House document Tom-b (talk) 17:14, 13 September 2012 (UTC)


 * Yes, the new lede image (& caption) seems much better - Thanks for your efforts - and - Enjoy! :) Drbogdan (talk) 18:44, 13 September 2012 (UTC)


 * Thanks! Tom-b (talk) 12:46, 14 September 2012 (UTC)

Lifeless moons
I'd like some comment on this diff. To me seems fairly obvious that the moons still appear lifeless, and will continue to appear like that until someone finds evidence of life on them. User:Kalidasa 777 modified in "initially appeared", implying that they now appear somehow inhabited. I don't want an edit war, so some comment would help. Thanks. -- Cycl o pia talk  01:45, 15 June 2010 (UTC)

How do you suppose a world with microbial life would appear to a space probe flying by, or orbiting overhead, or landing without instruments specifically designed to search for organisms? Hasn't Titan, in particular, recently been yielding the sort of data (re levels of hydrogen, acetylene, ethane near the surface) that would be expected from a Titan-like world that does have life? No-one is saying this proves living things are there... but, does it now appear lifeless, or does it now appear possible for life? Kalidasa 777 (talk) 05:56, 19 July 2010 (UTC)


 * "Appear lifeless" means "there are no obvious signs of life". That's the case. No obvious signs: there are faint, remote clues. So they appear lifeless to all practical purposes. Note that "possible for life" and "appear lifeless" are not contradictory: the Atacama desert is possible for life, but it appears lifeless nonetheless. -- Cycl o pia talk  10:42, 6 August 2010 (UTC)

Existence is the wrong question
Whether life exists in any other place is an unsophisticated question for a scientist. A better question would be what is the frequency or density of life in the universe. How often does it form? In how many forms does it form. We have a lot of data already, because we all agree that life exists in the universe, on Earth. The question of density already has an answer. We have life on Earth. If we discover life in other places, we will have even more data. The question of whether life exists is also already answered. To separate life on Earth from all other potential life is more religious than scientific. The question of existence will not have an answer until we find extraterrestrial life. If that happens then the answer will be yes, it exists, and the new question will be about frequency or density. Why wait? —Preceding unsigned comment added by 68.2.47.164 (talk) 07:50, 1 August 2010 (UTC)
 * 1) New stuff goes at the bottom.
 * 2) This is not a general discussion forum but a venue to discuss how to improve the article.
 * 3) The article is not supposed to investigate questions, but simply report what is in sources. See the neutral point of view policy. It is also not supposed to speculate, see this section of the essay "What Wikipedia is not."
 * 4) Please sign your posts in talk pages with four tildes ( ~ ). Ian.thomson (talk) 17:48, 1 August 2010 (UTC)


 * The point raised in the unsigned comment above has to do with the way astrobiology is conceived, as explained on the page astrobiology. I've added a few words to this Extraterrestrial Life article, briefly clarifying that life on Earth (viewed in its astronomical context) is also within the field of astrobiology. Kalidasa 777 (talk) 03:45, 6 August 2010 (UTC)

I thought the real question were "Is there another intelligent life-form?", "Did intelligent life-forms visit early humans?" or "Is there life on another planet in our solar system?" Dunkleosteus77 (talk) 18:02, 10 April 2015 (UTC)

Possible impact on Earth by extraterrestrial beings?
Sorry but this section is irrelevant. To me they are oppinions not fact. Maybe we should say it is Stephen Hawkings opinion? Steahl (talk) 20:46, 25 September 2010 (UTC)
 * Keep section. Suggest renaming it to avoid speculation. All is One  (talk) 20:13, 27 September 2010 (UTC)


 * I'm for keeping it as well. Autumn Veil 07:45, 1 October 2010 (UTC) —Preceding unsigned comment added by Autumn Veil (talk • contribs)


 * I'm for keep but why is the section so short? I remember the PBS program NOVA having at least three separate episodes on how the world may react to knowledge that life exists off of earth (not even intelligent life..).  There are books, newspaper articles, and religious commentary on the subject.  Why do we only have one scientists opinion stated....or am I missing a link to the larger article?  —Preceding unsigned comment added by 97.112.13.62 (talk) 16:39, 5 December 2010 (UTC)

Someone with write privileges, please add that life on earth can also be based on Arsenic; NASA recently discovered this: http://www.nasa.gov/home/hqnews/2010/dec/HQ_10-320_Toxic_Life.html —Preceding unsigned comment added by 24.161.73.14 (talk) 23:11, 12 December 2010 (UTC)
 * It has not been "discovered", it has been claimed as a result of a controversial experiment that some peers have harshly criticized, so we cannot yet state that life can be based on arsenic instead of phosphorus. -- Boing! said Zebedee (talk) 20:30, 28 February 2011 (UTC)

This article has just been published and outlines a number of possible scenarios: http://arxiv.org/ftp/arxiv/papers/1104/1104.4462.pdfTotorotroll (talk) 20:51, 18 August 2011 (UTC)

Requirements
Life on earth does not require carbon, oxygen, phosphorus and so on, that entire premise is as outdated as phrenology. Discuss removing or modifying it. 99.236.221.124 (talk) 01:53, 17 December 2010 (UTC)
 * Does it not? Please explain. -- Boing! said Zebedee (talk) 23:41, 22 January 2011 (UTC)


 * I think the person who started this thread meant life in the Universe, see Arsenic related threads. The point is that animate matter can arise in material evolution on a basis different from what has happened on the Earth. Life is simply animate matter, not animate matter life that which evolved here. A priori only a narrow anthropocentric viewpoint requires it to be carbon based because we happened to evolve from such a chain. Any active organization based on another element that climbs the stages of control metasystem transition from the first molecular combinations could lead to an alternate basis for "organic chemistry" and could evolve intelligent animals based on that chemistry, e.g. Arsenic, Silicon, etc. Those stages being: control of position - motion, control of motion - irritation, control of irritation - reflex, control of reflex - association, control of association - thought, control of thought - culture.

However, it's correct I think that the Arsenic using molecular phenomenon observed don't amount to such a line or even a basis for an alternative organic chemistry, so that those observations and conjecture/speculation that life could have taken that route here what should be cast as like phrenology.198.255.198.157 (talk) 11:46, 24 December 2013 (UTC)

Arsenic
I've reverted the addition of factual statements that those "arsenic bacteria" can use arsenic as a substitute for phosphorous. The claim has been made, but it's highly controversial, and some peer reviewers have criticized the experimental methods. Factual claims of its being a "discovery" are therefore way premature. -- Boing! said Zebedee (talk) 23:37, 22 January 2011 (UTC)

Edit request from 173.77.78.122, 14 February 2011
The author of "Sefer HaBrit" (first published in Holland, 1797) is the eminent 18th century kabbalist, Rabbi Pinchas Eliyahu Horowitz of Vilna. This book was one of the primary sources for scientific knowledge among early 19th century Jewish religious scholars; encyclopedic in scope, it discusses the secular science of the author's day from a kabbalistic point of view in Part I, and outlines certain basics of Kabbalah, as well as the mystic's quest for Divine revelation in Part II.

(Perhaps this should be mentioned after citing the book as a Jewish work that mentions extraterrestrial life.)

173.77.78.122 (talk) 00:41, 14 February 2011 (UTC)

Not done: That information does not appear to be relevant to this article; here, all we are really concerned with is the books comments about extraterrestrials. Qwyrxian (talk) 14:06, 14 February 2011 (UTC)

NASA scientist finds evidence of alien life
Today's news. NASA scientist finds evidence of alien life and 72 news articles today. Have fun! CarolMooreDC (talk) 05:01, 6 March 2011 (UTC)
 * Added a related note & refs to the main article - entirely ok to improve wording, location, etc as needed of course - in any case - enjoy! :) Drbogdan (talk) 19:09, 6 March 2011 (UTC)

Wow! Signal found! SPACE.COM - 35 years after message was sent a reply was found. http://i.space.com/images/i/000/018/772/i02/wow-signal.jpg?1340655163 Just in case any aliens out there in the universe are listening, more than 10,000 Twitter messages, plus videos from celebrities such as comedian Stephen Colbert, have been beamed into space as a big "Hello!" from Earth.

The messages are intended as a response to what's called the Wow! signal, an intriguing radio signal detected on Aug. 15, 1977 that some thought was a call from extraterrestrials. The 72-second transmission was picked up by the Big Ear radio observatory at Ohio State University, coming from the direction of the constellation Sagittarius. Because the radio signal was 30 times more powerful than the average radiation from deep space, a volunteer astronomer named Jerry Ehman who was watching the telescope data scrawled "Wow!" on a computer printout, leading to the signal's moniker.

Crop Circle Response to Human Civilization http://www.ufos-aliens.co.uk/final.gif Corresponding information to a crop circle printed from outer space (further info needed) — Preceding unsigned comment added by Shaxster (talk • contribs) 07:58, 24 March 2015 (UTC)

Who says Mercury might have life?
I was surprised to see Mercury in the list of bodies in the solar system which have been suggested as possibly having life. I checked the reference given. MESSENGER Scientists 'Astonished' to Find Water in Mercury's Thin Atmosphere It talks about "water-related ions" in the extremely tenuous atmosphere, and about possible reservoirs of water ice near the poles. But ions are charged molecules, and water molecules (charged or otherwise) don't necessarily say anything about life. As I understand it, liquid water is the stuff astrobiologists have in mind when they talk about "following the water" in the search for life; and I couldn't see any reference in the article to liquid water being a possibility on Mercury. Nor could I see any direct statement (one way or the other) about prospects of life there... If anyone can find a statement by a planetary scientist actually saying that Mercury might have life, then yes, great, include Mercury in the list... Otherwise, I have to say that this comes under the heading of Original Research by a Wikipedian. Kalidasa 777 (talk) 07:08, 16 April 2011 (UTC)
 * I'd like to see any such reference as well. I, for one, was under the understanding that Mercury was very similar to Earth's Moon, albeit somewhat more massive and orbiting the Sun independently. The Mysterious El Willstro (talk) 06:54, 18 May 2011 (UTC)

Minor correction
Mentions of finite (especially known and finite) numbers of anything in the whole Universe are never strictly speaking correct, because we have no way of knowing all of our continuum, which apparently is nearly Euclidean (which would provide infinite volume as per geometric laws) and if anything slightly parabolic rather than elliptical. So, any such mention of a total number of galaxies or galaxy clusters should be stated in terms of the Observable Universe, IE the part of the Universe that is close enough to Earth that light has had time to reach us already since the Bang. (Granted, the density of the Universe is apparently low enough to tend toward continued "expansion," reduction of density of the Universe even lower, if the Observable Universe is any guide at all.) The Observable Universe is the only part of the Universe about which we can know anything at all, so certainly it's what Hubble is showing. I've clarified this. The Mysterious El Willstro (talk) 07:07, 18 May 2011 (UTC)

Arecibo message
The arecibo message shown has a wrong caption. It talks about the attempt of human contact with aliens or something like that, but on the actual Arecibo message wiki article it talks about it actually being a way of showing the strengths of the technology they had. Please correct that. --Roflmaoshizmp (talk) 18:51, 6 June 2011 (UTC)
 * I think the former is a prerequisite for the latter. That is, your message first need to be received by the aliens before you can attempt to demonstrate your technological level. Hence, I don't the caption is incorrect as written. Regards, RJH (talk) 15:53, 9 August 2011 (UTC)

False assertion
The following statement appears to be a false assertion:
 * Because Earth and other planets are made up of "stardust"; that is, relatively abundant chemical elements formed in stars, it is very probable that other planets may have been formed by elements of a similar composition to the Earth's.

First, gas giants are primarily composed of hydrogen and helium, which are relatively scarce in the Earth. Hence, this statement can only be made with regards to terrestrial planets. Second, simulations show that there can exist a diverse range of terrestrial planet types: Thus, many terrestrial planets may exist that do not have a similar composition to the Earth. I think the claim should be reworded. Any suggestions? Just stating that the terrestrial planets are made of star dust doesn't seem very useful. RJH (talk) 20:34, 8 August 2011 (UTC)
 * That paragraph and the next few appear to be original research... In the mean time, perhaps
 * Terrestrial planets, such as Earth, are formed from "stardust" in a process which allows for the possibility of other planets having formed with compositions similar to Earth's."
 * Seems to be what the author(s) were trying to say, but is clearer and doesn't appear to contradict the information you've cited. Ian.thomson (talk) 22:03, 8 August 2011 (UTC)
 * Yes, that should work. Thank you. Regards, RJH (talk) 22:06, 8 August 2011 (UTC)

additional article requests related to the topic
i think we need an article called "list of extra terrestrial life forms" because that way it will be a proper list a.k.a not fictional aliens i can't help though cause i'm doing other stuff but i still think it should happen Ace10000 (talk) 12:12, 20 August 2011 (UTC)


 * The list has been made: It is empty. It is accurate. BatteryIncluded (talk) 16:39, 21 February 2012 (UTC)

Overlap with astrobiology article
The division of content between this article and astrobiology seems a bit fuzzy to me. What is the intended rationale, if any? -- Beland (talk) 03:59, 22 August 2011 (UTC)


 * Agree, from what I can tell there are key differences though (although I agree, this article should redirect to astrobiology) All of the same topics are covered there, the only notable exceptions being:


 * Early philosphy of life elsewhere in the universe
 * UFOlogy and Conspiracy theories - Area 51, Roswell, Alien abduction and related pseudo-sciences.  These are best kept to the UFO articles.  The link to extraterrestrial life is a stretch, the realm of popular culture
 * Science Fiction (Orson Welles etc) also pop culture - film etc

The topic in my opinion is too broad, these pseudo-scientific and philosophical topics rub shoulders with scientific topics. Wikipedia is an encyclopedia, so in my opinion the topic of extraterrestrial life should be kept to its scientific study. --EvenGreenerFish (talk) 05:17, 15 November 2011 (UTC)


 * It's pretty broad, but where you put the material on beliefs and fiction and such if this article was turned into "Science of extraterrestrial life" or something like that? Dicklyon (talk) 06:10, 15 November 2011 (UTC)

Halo effect
While I don't necessarily object to its inclusion in the article, I fear that the few sentences mentioning the unsupportable conjecture of such perceived luminaries as Stephen Hawking and Jared Diamond gives undue weight to the negative side of the debate over the possible effects of extraterrestrial contact. As a physicist, Hawking is, to put it bluntly, simply out of his depth. His understanding of the fate of American Indians after contact with Europeans seems extremely shallow at best. Hawking isn't the only physicist or astronomer to make such comparisons, but most seem to be under the mistaken impression that native peoples and cultures were somehow destroyed as a result of these contacts. In fact, cultural persistence in the face of such adversity is nothing short of remarkable. Where and when peoples and cultures did die out, the did so as a result of disease, something which both humans and advanced alien lifeforms have a much more fundamental understanding of than fifteenth century Europeans or Indians. As for Diamond, as an anthropologist he would, at first blush, appear to be somewhat more credible regarding such an unanswerable scenario, but his notions of why various groups of New Guinea or pre-Columbian North America "failed" are similarly simplistic and ahistorical. Keep such information if you must, but better balance should be sought, lest the name-recognition value of Hawking or Diamond might lead people to believe that there is something approaching a consensus on the matter. To the stars, Shorbu!--172.191.0.104 (talk) 04:16, 7 October 2011 (UTC)


 * We can't travel to the stars in any time frame less than millenia, so please calm thyself; and if you think the cultures of North America "survived" the contact with white European civilization, think again. Oh, there are meager remnants, but for all intents and purposes those cultures were wiped away in both intentional and unintentional actions.  You don't have to be a chicken to judge an egg, and Hawking is a bright enough man to ponder this issue and get respect for his beliefs. HammerFilmFan (talk) 23:12, 4 September 2012 (UTC)
 * Not sure how you ascertained my state of mind from that, but, regardless, the fact remains that Hawking's popular reputation as a physicist gives his opinions on this (and other matters, like, oh...God) undue weight. Why the hell would you want a chicken to judge an egg, anyway? Get an ornithologist, please, or at least someone that knows about chickens. Hawking is free to ruminate on anything he chooses, but it isn't safe to just assume that he knows what the hell he is talking about. Besides that, even if you're so-called "meager remnants" notion were true (which is debatable), it would be because of the aforementioned epidemic diseases, not because these cultures collectively curled up into a ball and shat themselves upon contact with a more advanced civilization, which is exactly the idea being professed here: not disease, not malice on the part of our new alien overlords, but the fact that our puny human pea-brains would not be able to comprehend a culture/race more advanced than we are. Thus, even if the historical examples of culture shock-induced decline were valid (which is, again, debatable) to extrapolate this into some great governing "law" for all time is inappropriate.--172.190.50.161 (talk) 03:30, 2 April 2013 (UTC)

Habitability vs. Inhabited and other Weasels
I feel strongly that the "Background" section (if not the whole article) needs a re-write as I perceive the use of some weasel wording (WP:Weasel) that distorts the original scientific meaning. One example is:


 * "Suggested locations at which life might have developed, or which might continue to host life today, include the planets Venus[5] and Mars, Jupiter's moon Europa,[6] and Saturn's moons Titan and Enceladus.[7] In May 2011, NASA scientists reported that Enceladus "is emerging as the most habitable spot beyond Earth in the Solar System for life as we know it".[8][9] Life may appear on extrasolar planets, such as Gliese 581 c, g and d, recently discovered to be near Earth mass and apparently located in their star's habitable zone, with the potential to have liquid water."

The Most obvious one is the incorrect use (and assumption) that habitability equals inhabited. Planetary habitability is the measure of a planet's or a natural satellite's potential to sustain life. That means that a planet can be habitable and be completely sterile.

The paragraph above also indicates that they might continue to host life. Continue? It was never determined they EVER hosted life al all. How can they "continue"? Regarding extrasolar planets, the same weasel wording is used. No scientist has published that "Life may appear on extrasolar planets". Experts are only starting to collect data on possible "habitability" or on environments friendly to host life (if it was introduced). The article goes on to mention "extraterrestrial objects" - That is a very wide statement. What is that?? Is it a StarTreck phaser handgun (inexistent) or meteorites (existent)?

These are just a couple of observations on many inaccuracies and weaseling in this article. I would spend time editing it for scientific accuracy but since we already have the Astrobiology article, it'd make this one redundant - if fixed. I am tempted to propose a merge with the Astrobiology article and move/merge all the assumptions (non-scientific material) and "beliefs" in an appropriately named article. What say you?BatteryIncluded (talk) 17:19, 21 February 2012 (UTC)


 * Don't we begin our search for in "habitable" places instead of "inhabitable" places? We are at that very opint right now: considered whether Life As We Know can exist on various bodies in our solar system, based on conditions found there, which are either habitable or inhabitable. Kortoso (talk) 00:59, 27 November 2013 (UTC)

Life on Venus?
"The planets Venus and Mars, along with several natural satellites orbiting Jupiter and Saturn, and even comets, are suspected to possess niche environments in which life might exist." I have no quarrel with most of this statement, except for having included planet Venus in this category. Venus was a candidate for extraterrestrial life a long time ago. Since the Venera missions new data was collected. Today we know much more about the climate and surface of Venus to discard many of the more optimistic theories about life in Venus. We know, for example, that it is not possible for life as we know it, to live in the surface of Venus, it is an Inferno with 92 atmospheres of pressure and 900 degrees Fahrenheit, cooking all there is and it is extremely dry. Actually there are only a few defenders of the theory that life may exists in the lower strata of Venus atmosphere, namely, Carl Sagan, David Grinspoon and Dirk Schulze-Makuch, but it is worth mentioning that Sagan died in 1994 and he was relying on data that was publicize in the 70's. So his hypothesis will probably have change in light of new data today. The other two, namely Grinspoon and Schulze-Makuch, both publicized their hypothesis more than a decade ago with the exception of Schulze, who did it in 2004, but to my knowledge there has been no follow up of this idea, particularly when new data has shown that Venus is so dry that if you were to squeeze it, all the water in the planet (including its atmosphere) would amount to no more than a 3cm-high ocean. Moreover, we know that Venus looses a great part of its atmosphere due to solar winds, which makes it even drier. So, even leaving aside the possibility that there may be some form of life still resilient enough to live in this super-dry environment, it would not be water based. Given the above, it is safe to assume that probabilities rule out the scenario of life thriving or even been able to exists in Venus Atmosphere. Therefore, to say that "Venus is suspected to possess a niche environment in which life might exist" is actually false. There is no reasonable chance for suspecting that life may exists in Venus given what we know of Venus' atmosphere and surface today. — Preceding unsigned comment added by Sandokant (talk • contribs) 14:41, 19 November 2012 (UTC)
 * Please read WP:No original research. Editors do not argue with sources, they simply present reliable sources and what they say.  If you properly cite sources saying that this hypothesis is not considered tenable by the scientific community, we can add that after the current line.  Ian.thomson (talk) 14:49, 19 November 2012 (UTC)

One of my main sources is: "Assessing the Plausibility of Life on Other Worlds" by Louis Neal Irwin and Dirk Schulze-Makuch. Astrobiology. June 2001, 1(2): 143-160. doi:10.1089/153110701753198918.

But I also want to stress, that by the very nature of the question it is extremely difficult to address the untenability of this hypothesis in the scientific community, because there are simply no polls that show what are the thoughts on the matter about this in the scientific community (as there are none about the possibility of life on the Moon). In any case, I do not think that it would be necessary for saying, for example, that Carl Sagan was one of the few scientists who thought that there may be forms of life thriving on Jupiter's atmosphere, although actually almost nobody in the scientific community would be giving it much thought nowadays. The question is not if I am doing original research, which I am not, but if the statement in the article, as it has been put, really reflects current scientific views on the matter, that is: If "Venus is suspected to possess a niche environment in which life might exist" and if the scientific community really believes it so. That is a statement, which anyone interested in the search of extraterrestrial life will certainly answer with a definite NO. Which, by the way, does not rule out that possibility, but that was not the question. Listen, the only thing I am arguing is the framing of the statement, which does not reflect the main scientific perspectives on the matter, not that there is no possibility of finding life on Venus, which is an entirely different matter altogether. (After all, the statement "there could be life on the Moon" has not been refuted by science, but it does not mean that believing that 'there could be life on the Moon' reflects the main scientific perspectives on the matter). Just change the framing of the statement by saying that it is a possibility, but does not reflect the main trends in current scientific research of extraterrestrial life in the Solar System and many of us would be more than happy with the result. I can do it myself, without omitting the opinion of scientists who, like Sagan, defended or still defend that view (which still does not reflect the main scientific opinion on the matter) Thank You.Sandokant (talk) 03:06, 20 November 2012 (UTC)

Life before Earth?
relevance:extraterrestrial life, panspermia, origin of life, evolution, Moore's Law http://arxiv.org/ftp/arxiv/papers/1304/1304.3381.pdf 217.89.117.154 (talk) 08:58, 18 April 2013 (UTC There're many theories describing the origins of life on Earth. The two most popular are 1) A meteor crashed releasing microbial organisms onto earth; 2) Microbial organisms where created in a chemistry set known as Primordial Earth Dunkleosteus77 (talk) 18:00, 10 April 2015 (UTC)

Curiosity illustration - Mission is not an attempt to find life
Why is Curiosity used as an illustration when it is not equipped to or designed to find life ??? Its mission is to find evidence of past habitability. --EvenGreenerFish (talk) 05:33, 13 May 2013 (UTC)
 * FWIW - seems the Curiosity (rover) may not have instruments capable of detecting life forms directly - unless the life forms could be imaged of course - but the rover seems to have sufficient ability to determine some conditions of habitability that may allow (certain?) life forms to survive - see => Timeline of Mars Science Laboratory (and Lichen and lichen survives Mars conditions) - this limited rover ability is, at least, on the way toward finding life on Mars I would think - in any case - Enjoy! :) Drbogdan (talk) 14:09, 13 May 2013 (UTC)

Citations not needed?
In "Indirect search" para 1, two statements are flagged as needing citation. The first (that putative extraterrestrials might not be broadcasting comprehensibly to Earth, or at all) is self-evident if one accepts the mathematical laws of probability, and the second (that electromagnetic signals received from distant astronomical bodies would have been created in the far past) is a consequence of the finite speed of light, as per Special Relativity. Both are part of fundamental scientific knowledge. Does the editor doubt them? 121.99.93.160 (talk) 01:01, 29 June 2013 (UTC)

Whacky underground alien speculation
Removed this speculative claim:


 * Subterranean tunnels in the United States have also been investigated for extraterrestrial life.[73] Due to advances in Gravimetry, colorful images are available to assist scientists in uncovering potential underground cities.[74]﻿[75]

Citations were provided, but they did not support the claims. Such claims are pseudoscientific, based on conspiracy theories and though they are technically a form of SETI have little basis of fact. Even if was plausible that an advanced alien species could have hidden bases on Earth, to specifically claim that there could be "cities" underground in the United States is a pretty enormous stretch.--EvenGreenerFish (talk) 06:01, 8 July 2013 (UTC)

Malware Link Removal
-- Gary  Dee  18:21, 21 July 2013 (UTC)
 * Potentially Malicious Domain: (EXPLOIT, RBN Known Malvertiser IP 22)
 * hxxp://www.dailygalaxy.com/
 * https://www.virustotal.com/de/url/06f7d7c43c549e5e370a1e64d961bbbb9f4be55c29111d41e93ae9bb66489f23/analysis/1374427632/
 * JS/Exploit-Blacole.cw
 * https://www.virustotal.com/de/file/5ea1609b649e14ccfd84fec0d7e9d13cb0f885876f0ef5fae0407d23490ecddc/analysis/1374428349/
 * https://www.virustotal.com/de/file/192346fedd2cc52353f89fd93fe1da383b6fa8a969c4c27f1fa663d4a40c3ae4/analysis/1374428351/
 * https://www.virustotal.com/de/file/2656324fdda8179413cf416bd559e5f6f13864886a6d31907928e6334e64ebfa/analysis/1374428355/
 * https://www.virustotal.com/de/file/a9dc933ca440b54c82be1fc9a71df252cf738ca3d908814adc656d9ffcc7c6ed/analysis/1374428365/
 * https://www.virustotal.com/de/file/42430671c0fd1332eeb990373a1707da334520e2bae48d1dc9ee6df47b728125/analysis/1374428367/
 * https://www.virustotal.com/de/file/8eb65132b441b07193c467814570e2c0959ceff07e35149247f531dde514782f/analysis/1374428377/
 * REFERENCE: http://jsunpack.jeek.org/?report=49695ac9748fc84c3953dd8db54a661f52fd8be4
 * http://urlquery.net/report.php?id=3902995
 * SEE ALSO:
 * http://quttera.com/detailed_report/www.dailygalaxy.com
 * http://sitecheck.sucuri.net/results/www.dailygalaxy.com
 * http://www.UnmaskParasites.com/security-report/?page=www.dailygalaxy.com

Not neutral
"The failure so far of the SETI program to detect an intelligent radio signal after decades of effort, has at least partially dimmed the prevailing optimism of the beginning of the space age. Notwithstanding, the belief in extraterrestrial beings continues to be voiced in pseudoscience, conspiracy theories, and in popular folklore, notably "Area 51" and legends. It has become a pop culture trope given less-than-serious treatment in popular entertainment with e.g. the ALF TV series (1986–1990), The X-Files (1993–2002), etc."

That hardly sounds neutral. No source, obviously an opinion representing a more cynical point of view, while implying that pseudoscientists, conspiracy nuts and sci-fi fans are the only groups of people believing in extraterrestrials. Meanwhile, there are legitimate astronomers, physicists, and mathematicians, who believe that extraterrestrials are not only likely, but statistically sure to exist. Not to mention the amounts of proof pointing to it. Even people like Hawking, Kaku, and countless others have supported the "pro-ET" stance on numerous occasions, and I wouldn't call them "pseudoscientists" (while some may think that being a popularizer of science somehow makes a person a bad scientist, it's not really the case). And while I doubt they're among us "Men in Black style", the support for their existence is hardly coming only from pseudoscience, conspiracies, and sci-fi. That whole paragraph is unwarranted, not needed, untrue, and doesn't really add anything of value to the article. It should either be rephrased, removed, or moved to a section about skeptical views on the matter.

http://www.telegraph.co.uk/science/space/7631252/Stephen-Hawking-alien-life-is-out-there-scientist-warns.html http://www.huffingtonpost.com/2013/03/19/aliens-the-definitive-guide_n_2909012.html


 * I agree it could benefit from a source. But I don't think its central point - that the "profile", if you like, of ETs in popular culture is significantly higher than in science - is a terrible one to make, and the article elsewhere does give plenty of space to serious scientific support for the concept. Barnabypage (talk) 09:57, 4 October 2013 (UTC)


 * No experiment is a failure if it returns data. That said, SETI is still in its infancy, and has yet to scratch the cosmic surface, so to speak. Kortoso (talk) 01:02, 27 November 2013 (UTC)

Simple minded error of knowledgeability, elementary Arithmetic, and as ever ....
9.7 +- 2.5 is not "billions of years before the earth formed". The Earth is 4.5 billions years old. This universe is 13.5. You cannot take the minus end of the range like that, it needs to be qualified by "possibly" instead of stated as if the 7.2 value of the range was an established fact. That's why it's an interval and not a simple number. The facts as stated just as positively support the first life arising elsewhere after it did on the Earth. in as much as life on Earth is itself billions of years old. Animal life here is only about a half a billion and assuming the same time is generally required it's quite possible this is the first world on which animal life developed, just numerically unlikely, assuming the Copernican principle. Given the stated data, current best understanding of things, the earliest time that life could have reached the animal stage is about 2.5 billion years ago by which time it was well established on the Earth so this is more typical crowd sourced misinformation. This shows why they're called the ignorant masses. Lycurgus (talk) 18:08, 18 December 2013 (UTC)
 * FWIW - Seems like a lot of uncited opinion (and/or presumptions?) - (WP:OR?) (WP:NOTAFORUM may apply?) - re sourced material in the main article - unclear how your comments help improve the main article - worthy text material supported by WP:RS, WP:CITE and/or related - to improve the main article - welcome of course - in any case - Enjoy! :) Drbogdan (talk) 13:57, 18 December 2013 (UTC)
 * Mein Herr Doktor, the use of the honorific in your username is telling (of an apparent intent to pettifog). 198.255.198.157 (talk) 20:52, 18 December 2013 (UTC)
 * Thank you for your comments - nonetheless - any sourced text & related to consider for the main article welcome of course - in any case - Enjoy! :) Drbogdan (talk) 22:34, 18 December 2013 (UTC)

NASA-TV (07/14/2014-2pm/et/usa) - Search for Life Beyond Earth.
NASA-TV - Monday, July 14, 2014 (2:00-3:30pm/et/usa) - panel of leading experts to discuss plans leading to the "discovery of potentially habitable worlds among the stars" => < ref name="NASA-20140710"> - Enjoy! :) Drbogdan (talk) 17:17, 11 July 2014 (UTC)
 * FOLLOWUP - NASA VIDEO REPLAY - Space Experts Discuss the "Search for Life in the Universe" (86:49) at => http://www.youtube.com/watch?v=GNjuz6MO0eU - Enjoy! :) Drbogdan (talk) 12:47, 15 July 2014 (UTC)

American perspective
Although there is some discussion of other views, there is a definite bias towards American and/or Anglophone views of this subject.--MacRùsgail (talk) 14:54, 4 August 2014 (UTC)

Deletion of reliably sourced content supporting evidence of contact
Wikipedia has a policy about neutral point of view WP:NPOV. Relevant, reliably sourced material should not be removed from the article just because it goes against conventional wisdom. This material is supported by mainstream press reports: https://en.wikipedia.org/w/index.php?title=Extraterrestrial_life&diff=625211231&oldid=625204360 Ghostofnemo (talk) 11:53, 12 September 2014 (UTC)


 * I agree with David's removal of the material. The purpose of this article is to document the development and testing of hypotheses on extraterrestrial life -- not to recount anecdotes about alleged ET sightings, whether they have received press coverage or not. WP:NPOV does not apply here.  DoctorJoeE  review transgressions/ talk to me!  14:29, 12 September 2014 (UTC)


 * Absolutely agree with DoctorJoeE and thank him for his support. The Extraterrestrial life article is about the scientific search and development of research into the subject. It is certainly not for conspiracy theories about UFO visitation, just because they have been reported in the mainstream press - the "Roswell Incident" and "Hitler Diaries" were reported in reliable media, but that does not make them fact or even reliable reports. The relevant Wikipedia pages on the alleged UFO sightings also cast serious doubts on the reliability of these accounts. The material that Ghostofnemo inserted needs reverting again. Regards, David, David J Johnson (talk) 14:46, 12 September 2014 (UTC)


 * I apologize, I didn't see this discussion before I reverted, but a (reliable) reference reporting on the existence of a conspiracy theory about alien visitation is *not* a reliable report on actual evidence for (or against) extraterrestrial life. Simply a different subject.  Rwessel (talk) 15:11, 12 September 2014 (UTC)


 * Agreed. When mainstream science begins to discuss whether they have found extraterrestrial life, whether it be a UFO or a discovery through astronomy, then we will have a topic to feature here. Kortoso (talk) 16:32, 12 September 2014 (UTC)

So it's ok to have a section in the article in which the U.S. government denies any knowledge of the existence of extraterrestrial life, but not ok to have information from mainstream press sources, not about "conspiracy theories", but about numerous government employees who claim to have witnessed evidence of extraterrestrial life? How is that WP:NPOV? That's like, in an article about the solar system, quoting authorities saying the sun and planets revolve around the earth, but not allowing a news story quoting astronomers who challenge that position by suggesting the earth is just another planet that revolves around the sun. It's not up to us to filter and decide what is true or untrue, accepted conventional wisdom or "conspiracy theory" - Wikipedia articles should include all relevant, reliably sourced aspects of the subject material. If government employees are coming forward and saying they have had contact with ET's, and the press is reporting it, that seems relevant to an article on extraterrestrial life! Ghostofnemo (talk) 01:03, 13 September 2014 (UTC)
 * The question is whether there are high-quality sources which treat what these people say as bearing on the serious topic of whether or not there is extraterrestrial life (there aren't such sources). For popular/sensational little green men stories there are plenty of other articles on Wikipedia. Alexbrn talk 03:53, 13 September 2014 (UTC)


 * Actually, we *do* filter the content of articles, by considering WP:FRINGE and WP:UNDUE. The notion that there is evidence that we are being visited by aliens is *far* off in the fringe, and just mentioning that some folks hold that position (third paragraph of section Background) is quite enough weight given to that.  While I would not object to trimming down the fourth paragraph (the one you mention), as the White House denial is of rather marginal relevance (and is effectively covered by the references and links in the third paragraph, specifically Extraterrestrial hypothesis), I think the last two sentences of the fourth paragraph are valuable, but those need some context (which is now being provided by the first three sentences). Rwessel (talk) 05:36, 13 September 2014 (UTC)
 * ABC News and two British newspapers covered these stories. That makes them notable. We don't decide what is notable, the reliable sources do. So what you are saying is that there is no possible way any eyewitness accounts, no matter how credible, no matter how many, that earth has been visited by extraterrestrials, will ever be allowed in this article. Here's a CNN article written by former Arizona Governor Fife Symington. http://edition.cnn.com/2007/TECH/science/11/09/simington.ufocommentary/index.html Excerpts: "In 1997, during my second term as governor of Arizona, I saw something that defied logic and challenged my reality. I witnessed a massive, delta-shaped craft silently navigate over Squaw Peak, a mountain range in Phoenix, Arizona." "As a pilot and a former Air Force Officer, I can definitively say that this craft did not resemble any man-made object I'd ever seen." and "I now know that I am not alone. There are many high-ranking military, aviation and government officials who share my concerns. While on active duty, they have either witnessed a UFO incident or have conducted an official investigation into UFO cases relevant to aviation safety and national security." Ghostofnemo (talk) 10:57, 13 September 2014 (UTC)
 * Ghosts, Bigfoot, apparition of the Virgin Mary - there are eyewitness reports for pretty much anything you care to imagine. They are not taken seriously as "evidence" by the sort of respectable, high-quality publications WP requires for sourcing in general (and in particular for exceptional claims). So no, Wikipedia will never treat anecdotes in the laypress as meaningful inputs into the serious question of extraterrestrial life (unless high-quality sources start doing so - which is highly unlikely). Alexbrn talk 11:06, 13 September 2014 (UTC)
 * Military personnel claim they killed bin Laden, too. Is that information in doubt until it appears in a scientific journal (hard to confirm because his body was dumped in the sea), or can we rely on mainstream news reports of claims by the military that he was killed? If mainstream news reports based on reports by military witnesses are acceptable in the case of bin Laden's death, why the double standard? Ghostofnemo (talk) 11:13, 13 September 2014 (UTC)
 * Here's another story. 12 people, airport employees and pilots, saw a flying saucer over O'Hare airport in Chicago in 2007. The FAA is not investigating. An object in the airspace over the country's busiest airport, and they aren't going to investigate? Was this a mass delusion? Was there LSD in the water cooler? Or do we take 12 eyewitnesses seriously? The mainstream news media is taking it seriously. http://www.npr.org/templates/story/story.php?storyId=6707250 and http://www.cbsnews.com/news/ufo-at-ohare-officials-say-weird-weather/ Ghostofnemo (talk) 11:45, 13 September 2014 (UTC)
 * The death of OBL is not seriously disputed (unlike the existence of Bigfoot, ghosts and little green men) and so does not require exceptional sourcing - though, as it happens, it is well covered in respectable literature too (e.g. here). Alexbrn talk 11:47, 13 September 2014 (UTC)
 * Not a scientific article by any stretch of the imagination. Ghostofnemo (talk) 11:49, 13 September 2014 (UTC) OBL family questions reports of his death, demands evidence, government refuses to supply it. http://www.aljazeera.com/news/asia/2011/05/201151143347815396.html Ghostofnemo (talk) 11:55, 13 September 2014 (UTC)
 * It doesn't have to be "scientific". OBL's death is accepted fact; there are however conspiracy theories he isn't dead; WP's policies/guidelines on WP:FRINGE content and neutrality mean the distinction between reality and fantasy is kept clean in this subject area too. Alexbrn talk 11:58, 13 September 2014 (UTC)
 * This is beginning to go off the original subject into the realm of "conspiracy theories". It needs to be said - once and for all - that Wikipedia relies on quality sources, the media might report fringe theories, but that does not make them mainstream or acceptable. Wikipedia also has articles on conspiracy theories and that is where the deleted contribution belongs. The consensus here amongst editors was that my original deletion was correct and may I respectfully suggest that Ghostofnemo accepts this. Regards to all, David, David J Johnson (talk) 13:09, 13 September 2014 (UTC)

To return to your original question -- is it okay to have a section in the article in which the government denies any knowledge of the existence of extraterrestrial life, but not okay to have information about numerous government employees who claim to have witnessed evidence of extraterrestrial life -- yes, it's okay. Because their is a yawning gap between evidence and people who claim to have seen evidence, i.e. hearsay. The government is saying that there is no compelling evidence to support all the hearsay, and that's true. The hearsay, no matter how extensively it is reported by the press, remains hearsay. Even after a century of UFO sightings, there isn't a shred of hard, reproducible evidence that any were actually UFOs. The conspirators, of course, say that the government is hiding all the real evidence, but there is no compelling evidence of that either. It's not our job to report hearsay, except in the articles about hearsay, where it is specifically labeled as such. This is not one of those articles. DoctorJoeE review transgressions/ talk to me!  13:36, 13 September 2014 (UTC)
 * The editors of the article are taking the unscientific position that the U.S. government never lies, and calling any suggestion that they have lied a "conspiracy theory". Is NSA mass warrantless wiretapping a "conspiracy theory"? It was until Snowden's revelations: http://www.theguardian.com/commentisfree/2014/may/17/government-lies-nsa-justice-department-supreme-court Director of National Intelligence lies to Congress: http://www.washingtonpost.com/blogs/the-switch/wp/2014/01/27/darrell-issa-james-clapper-lied-to-congress-about-nsa-and-should-be-fired/ The "conspiracy theory" label is usually enough to steer the media away, but in cases like the ones I've noted above, large numbers of eyewitness accounts by apparently reliable witnesses are difficult for them to ignore, without looking like they are obviously being pressured to deny coverage. Ghostofnemo (talk) 00:14, 14 September 2014 (UTC)
 * More directly applicable to this topic: "Charles Halt, Former Air Force Colonel, Accuses U.S. Of UFO Cover-Up" http://www.huffingtonpost.com/2012/09/24/ufo-secrets-turn-out-to-be-strong-opinions_n_1907492.html Ghostofnemo (talk) 00:33, 14 September 2014 (UTC)


 * Ah, the cabal theory. If you attack people who oppose you as if they were a collective with an agenda against you, then they will certainly become one. There is no cabal conspiring against you unless you create it yourself.  Also, consider that if many or most of the editors involved in a discussion disagree with you, it may be simply because you are wrong — or in violation of site policies (such as WP:UNDUE) — or, as in this case, both.  DoctorJoeE  review transgressions/ talk to me!  00:14, 15 September 2014 (UTC)
 * How can you say it's given undue weight - it's given no weight at all. This article violates WP:NPOV (neutral point of view) because MANY people claim they have had contact of one sort or another, and this has been mentioned by reliable sources (supplied with the deleted sentences and during this discussion), but it is only mentioned in the article to deny or ridicule that possibility. There is no mention of any evidence (retracted press releases, video, photographs, radar data, government documents) or eyewitness accounts of contact with ETs or their technology. "Conspiracy theory" is the modern term for "heresy". Science does not ignore evidence to protect holy cows. And the policy of Wikipedia is supposed to be "bring it on, if you have reliable sources" so that all relevant, notable points of view are expressed in articles. But what actually happens is that inconvenient data goes into "conspiracy theory" articles, in order to protect established dogma. Here's a story about a poll that says 48% of Americans think UFOs could be ET visitations: http://www.huffingtonpost.com/2013/09/11/48-percent-of-americans-believe-in-ufos_n_3900669.html That's not notable? Ghostofnemo (talk) 12:39, 16 September 2014 (UTC)


 * And 42% of Americans believe that God created humans in their present form within the last 10,000 years. I have a patient who believes that he is Napoleon.  Beliefs are neat, but don't confuse them with facts.  We're an encyclopedia; we deal in facts and hard evidence.  Unexplained sightings and blurry photos do not constitute hard evidence.  Hard evidence might emerge tomorrow (and I hope it does), but until it does, it's not our job to reinforce unsupported beliefs with hearsay.  (That's the Discovery Channel's job.)  In any case, consensus is firmly against you.  Enough.  DoctorJoeE  review transgressions/ talk to me!  13:56, 16 September 2014 (UTC)
 * Can you imagine an article about evolution that didn't mention people who don't believe in it? Ghostofnemo (talk) 14:00, 16 September 2014 (UTC)
 * Yes. Alexbrn talk 14:21, 16 September 2014 (UTC)
 * Well, luckily for Wikipedia users, if they visit the article Evolution, they will be aware of the fact that not everyone believes in it, and why: http://en.wikipedia.org/wiki/Evolution#Social_and_cultural_responses Ghostofnemo (talk) 14:23, 16 September 2014 (UTC)


 * Of course I can, and we have one here in the encyclopedia; equal time is not given to creationists -- they have their own article. Evolution is not a religion, or a belief.  One either accepts the scientific evidence supporting it, or one does not. Similarly, this article documents factual information, and we have no obligation to give equal time to unsupported beliefs.  Find us some hard evidence and you will have an argument. The fact that some percentage of the citizenry believes in spaceships, or that individuals have seen things that they believe to be spaceships, are not evidence of anything.  DoctorJoeE  review transgressions/ talk to me!  14:34, 16 September 2014 (UTC)
 * "Evolution is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community." From the article's talk page. Ghostofnemo (talk) 14:26, 16 September 2014 (UTC)
 * Yes and this article has a "Cultural impact" section in which we mention the people (conspiracy theorists) who believe in flying saucers, govt. cover-ups and such. Same sort of thing. Alexbrn talk 14:30, 16 September 2014 (UTC)

Life in Space
Of possible interest -- In any case - Enjoy! :) Drbogdan (talk) 14:11, 11 February 2015 (UTC)
 * Finding => NASA Workshop on the Potential for Finding Life in a Europa Plume (02/18/2015)
 * Spreading => NASA Workshop on Planetary Protection Knowledge Gaps for Human Extraterrestrial Missions (03/24/2015)

Garrett P. Serviss' Edison's Conquest of Mars
The book by Garrett P. Serviss, Edison's Conquest of Mars, is mentioned in the 19th century section. A recent edit has attempted to define that book's relationship to H. G. Wells' The War of the Worlds. The current text is at least partially incorrect, as Edison's Conquest of Mars is actually a sequel to Fighters from Mars, which is a unauthorized retelling of The War of the Worlds. Anyway, since War of the Worlds is a far more well known source, which illustrates the point being made nicely, I think we should remove Edison's Conquest of Mars (which is far less known) as trivia, rather than trying to explain the rather convoluted relationship between the two (or three) books. Rwessel (talk) 23:19, 15 April 2015 (UTC)

Direct search section
The direct search section has several entries on organics found in space, I assume this relates to abiogenesis, but that is not the topic of this article. I'd write a introductory paragraph for context or delete those entries. Cheers, BatteryIncluded (talk) 15:53, 4 June 2015 (UTC)


 * A link to a more appropriate article seems justified, since readers may be curious about the associations. Kortoso (talk) 17:07, 4 June 2015 (UTC)

Gaia Hypothesis mini-paragraph
, my WP:BOLD removal of the Gaia hypothesis statement on chemical disequilibrium is motivated by it being unsourced and, seemingly, wrong. Disequilibrium as an indicator of biology goes back at least as far as Sagan, but this is a separate concept from Lovelock's Gaia hypothesis: chemical disequilibrium (like Earth's atmosphere) should be expected in a biosphere whether organisms are evolving to maintain environmental parameters or not. The Gaia hypothesis continues to be an interesting and popular idea, but its validity even on Earth has always been somewhat doubtful. In such circumstances and with no source, I saw deletion as preferable to no action. But now we should discuss. Geogene (talk) 18:13, 4 June 2015 (UTC)

Direct search material (hidden by comment lines)
Several paragraphs in source file for the section on direct search were commented out, thus making them invisible on the regular page. These might be remnants from somebody's editing work. I don't actually know. They are, however, relevant, if also extremely detailed. I took the comment lines out so that everybody can see the material and consider its relevance, etc. Isambard Kingdom (talk) 18:38, 19 July 2015 (UTC)

Biochemistry
Would it be reasonable that the section on biochemistry be a bit more rigorously structured into two paragraphs, one on the importance of water and one on carbon-based chemistry? It is almost that way now, but some tuning up and moving material into this two-paragraph structure might make the point a bit more clear. Of course, some editors might have different opinions, hence my question. Isambard Kingdom (talk) 13:44, 24 July 2015 (UTC)


 * No, you are editing for the sake of editing. The section appears to be perfectly readable in terms of understanding. Other editor views welcome. David J Johnson (talk) 14:33, 24 July 2015 (UTC)


 * Hello. This article, although "Wikified" to a nice formatting, it contains several errors, some fringe assertions and outdated material. I agree in that the overhaul seems massive and sudden, and its regular editors might feel disconcerted, but I am sure it will improve its accuracy significantly. I think it used to be a "Good Article" but it was demoted for a reason.  If there is specific info you'd like to see reverted, please discuss it.  Cheers, BatteryIncluded (talk) 00:00, 25 July 2015 (UTC)

✅ - somewhat related - the unsourced (entirely "original research"?) sub-section "Extraterrestrial life" (and related text) has been removed - it's *entirely* ok with me to rv/mv/ce the edit of course - in any case - Enjoy! :) Drbogdan (talk) 12:52, 25 July 2015 (UTC)

Section: Ancient and medieval ideas
The section entitled "Ancient and medieval ideas" is basically religious speculation on extraterrestrial life. I wonder if it has any use in this article, even for context. I don't feel strongly one way or another but my intention is to delete it. Cheers, BatteryIncluded (talk) 18:17, 25 July 2015 (UTC)
 * Support. Seems like religion. Isambard Kingdom (talk) 18:21, 25 July 2015 (UTC)
 * Possibly summarize to a single paragraph? Isambard Kingdom (talk) 18:36, 25 July 2015 (UTC)
 * I don't think that a brief summary of pre-scientific thought on the matter is inappropriate. There is unquestionably a cultural aspect to the notion of extraterrestrial life.  Rwessel (talk) 21:04, 25 July 2015 (UTC)
 * I'm agreeing, now, with Rwessel. A short summary seems appropriate. The material is already there waiting to be made succinct. Isambard Kingdom (talk) 23:03, 25 July 2015 (UTC)
 * I'd like to make a specific point to mention that the Catholic church repressed any astronomical research and discoveries that opposed their religious view. The censure was not just on astronomy but in all sciences, and it lasted centuries. That is a very relevant religious context. BatteryIncluded (talk) 21:07, 25 July 2015 (UTC)
 * BatteryIncluded, I would be curious if the issue you raise here, the Catholic church repressing astronomical research, is specifically relevant to the article on extraterrestrial life, and, even more, whether or not it fits into the balance of this article. Can you share your thoughts on this? Thanks, Isambard Kingdom (talk) 23:00, 25 July 2015 (UTC)
 * Well, I am not religious so I am not eager to spend time on documenting it. But it relates to the early assertion of the existence of many other worlds (and maybe civilizations), which the church labeled a heretic (god created only one planet), and therefore the censure through the Roman Inquisition (Galileo Glilei and his trial comes to mind). Cheers, BatteryIncluded (talk) 02:54, 26 July 2015 (UTC)
 * On second thought, I rather stay away from that perspective. The article History of astronomy does not touch that subject, so I won't either. Cheers, BatteryIncluded (talk) 13:36, 26 July 2015 (UTC)

✅ -- Have a look, I'm not wedded to the summary, but it is, perhaps, a bit more of a balance, given other content in the article. I kept all the citation information. Isambard Kingdom (talk) 14:49, 26 July 2015 (UTC)

Mathematical Proof
In addition to the current article's equation for calculating a deterministic number about alien creatures (that is not a proof for the extraterrestrial life), add the logical mathematical proof of the extraterrestrial life (which is a mathematical proof for the extraterrestrial life debate, for the first time in mankind's history) to the article too, please. Link: https://hal.archives-ouvertes.fr/hal-01184545 --78.164.4.118 (talk) 15:22, 17 August 2015 (UTC)
 * ❌ It is a probabilistic mathematical argument posted in an open archive (HAL); not peer-reviewed, and not published by a reliable science journal. BatteryIncluded (talk) 15:46, 17 August 2015 (UTC)

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Will viruses count as extraterrestrial life?
It has been mooted that some viruses arrive on Earth from space. If this is proven to be so, will these viruses be regarded as extraterrestrial life? Many people (Brian Cox is one) don't regard viruses as life. Wythy (talk) 02:08, 3 April 2016 (UTC)
 * Good question. They have nucleic acids and evolve. I would say yes. However, don't expect them to just "rain down" from space. Both their protein coats (capsid) and nucleic acids (DNA/RNA) denature fast in the vacuum of outer space. Then you have the solar and cosmic radiation which fries them over the millions/billions of years they float about. Cheers, BatteryIncluded (talk) 02:34, 3 April 2016 (UTC)


 * Would depend, as you suggested, on your definition of life. Viruses are the simplest organism that could constitute life—DNA wrapped in protein casing. The case "for" is that they have DNA, and reproduce.  The case "against" is that their structure is so simple, and they carry out so few functions. But it's a moot point until you find one that can be proved to be of extraterrestrial origin.  Find one, then we'll argue about how to define it.  DoctorJoeE  review transgressions/ talk to me!  03:15, 3 April 2016 (UTC)
 * At minimum, they would certainly count as biosignatures since they only replicate inside living host cells. Dr. Chandra Wickramasinghe has made several such claims, but without support from peers. BatteryIncluded (talk) 13:22, 3 April 2016 (UTC)


 * Let's cross this bridge when there is actually good evidence of space viruses. I would say it should definitely be noted at this page, but for the moment it's a very fringe view if even that (and I doubt it will ever be anything more). A2soup (talk) 17:17, 3 April 2016 (UTC)


 * Aye. If extraterrestrial viruses are found, you can bet it would be a news item. But this is Wikipedia; we don't do "moot". :)
 * Kortoso (talk) 21:41, 5 April 2016 (UTC)

Watson paper
So, Dr Watson thinks that chances for intelligent ET is 0.01%. Given that thousands of scientists have expressed their opinion or assessment, I don't see why this one opinion has to be prominent in the introduction. I don't disagree with a mention of his estimate, but don't do it in the introduction which has to be a summary of the main points, and specially not in a manner that implies that number is a scientific consensus. BatteryIncluded (talk) 06:37, 22 April 2016 (UTC)
 * Totally agree with BatteryIncluded's comments above. This is only one scientist's opinion. David J Johnson (talk) 10:15, 22 April 2016 (UTC)
 * I also agree. Isambard Kingdom (talk) 14:20, 22 April 2016 (UTC)
 * Watson source --- I agree as well, but at the same time I think a lot of readers come to this article specifically in search of information regarding intelligent extraterrestrial life.  The fact that the current lede makes no mention denoting probability is a huge disservice to the reader (in my opinion). Can we work together in presenting consensus formatted material to the reader? -- Somedifferentstuff (talk) 16:10, 22 April 2016 (UTC)
 * I apologize if I came across harsh. Having worked briefly on the field (astrobiology) and in these Wikipedia articles, it is critical to express that all "estimates" rely on enormous assumptions and speculations. Citing a number, any number, is not helpful. Just take a look at the Drake equation article for example. A simulation on exoplanetology or planetary science (strictly astrophysics) is one thing, but biology does not conform to mathematical models. We just don't understand living systems-environment. Cheers, BatteryIncluded (talk) 17:59, 22 April 2016 (UTC)

I feel adding any comment about Watson's model into the lede would be a disservice to the overall value of the article. The lede presents facts and major theories clearly as it is, and the 2013 NYT op-ed by Davies (current Ref. #1) balances current thinking. Further balance results from sections on the Drake equation and Recent history under Cultural impact, i.e., after the lede presents the article, further perspective on the potential for intelligent alien life is adequately gained from the article. If Watson's model is to be given deeper attention, it might be used in a new subsection added under the Drake equation consolidating the Fermi paradox and the 2015 NYT Overbye essay. --Zefr (talk) 21:30, 22 April 2016 (UTC)
 * Business Insider, 23 Mar 16, presents several concepts for why humans have not had contact with aliens more advanced than us, possibly because we are in a supercomputer simulation game. 22 Apr 16, Neil deGrasse Tyson leads a panel of thought leaders on the idea that the universe is a simulation. Plenty of fun ideas... but over 2 hrs of conversation. --Zefr (talk) 16:13, 23 April 2016 (UTC)
 * Elvis shot JFK. -BatteryIncluded (talk) 18:17, 23 April 2016 (UTC)

Misleading !!!
The article seems to be arranged in such a way that aliens or extraterrestrial life exists. Its not in a neutral point of view. People are not saying why it may be wrong, it assumes that people know that ET doesn't exist and only proof regarding its existence should be given. Imagine when a kid ( i am not very old. ) with a NPOV reads this page. They will think that ET exists, only proof is not found. I'm serious. Some kids are refering to wikipedia. They blindly belive that ET exist and the scientists are genius peopel, cant be wrong. Why are they investing so much to find them. Seriously, my grandmother used to believe ghosts exist and she even saw them. I even belived. But you know better. So Im saying that the point of view should be a lttle bit NPOV. Thanks. --modi bhai (talk) 05:14, 29 September 2016 (UTC)

You can see that in first para of introduction its in NPOV. But he second and third para says as if most people belive that ET exists. I think the information in the introduction should not say about opinions or what people thinks. It should be about general information. Like the first para. you know about the effect of first impression. --modi bhai (talk) 05:22, 29 September 2016 (UTC)


 * I'll be honest, I don't see the basis in your statement. Nothing in the lead says that extraterrestrials exist, merely that the vastness of the universe suggests that something is likely out there; and it discusses efforts to try and find evidence of them. Seems pretty neutral to me. — Huntster (t @ c) 06:32, 29 September 2016 (UTC)

What i'm trying to say is that the introduction should not say about its existence as we are not sure. It should only have general info --modi bhai (talk) 07:30, 29 September 2016 (UTC)

Besides the line saying one of the researcher.... should not be in the introduction. --modi bhai (talk) 07:32, 29 September 2016 (UTC)


 * I see nothing wrong with the article as it stands. It is written in a neutral tone and I see no basis for alteration. The "editor" has already admitted that they have little knowledge on their User page. David J Johnson (talk) 10:24, 29 September 2016 (UTC)

There is about "possible basis". But nothing about why not. --modi bhai (talk) 07:34, 29 September 2016 (UTC)

I may be wrong about the introduction thing. But is there e article truly neutral. --modi bhai (talk) 07:35, 29 September 2016 (UTC)


 * Yes it's okay as far as the ordinary scientific understanding. Though it's rather minimal, the sections are very short and don't give much detail and it probably has some inaccuracies. I just checked the Mars section and it had several major mistakes which I have fixed. Someone with a good background in the subject needs to go through and check the whole thing. I'll look it over some time when I get a bit more time and see if I can find more things to fix and maybe expand some of it.


 * I think the intro doesn't make it clear enough that though scientists think that life may well be commonplace around other planets, they don't know for sure, and if it does exist, it might easily nearly all be ET microbes. For astrobiologists, an ET microbe would be a thrilling discovery which would be likely to revolutionize biology, medicine, perhaps agriculture, nanotechnology, and many other fields. So although they are of course interested in ETIs (Extra Terrestrial Intelligences) the main focus of most of astrobiology, except SETI, is on extraterrestrial biochemistry and microbes I have added a couple of sentences to the intro:

""There are many planets now known in the habitable zones of their stars and several places in our own solar system where it's thought life similar to ours may be able to survive. However, until we learn how life got started on Earth, we have no way to estimate how easy it is for life to evolve on those planets. If they do have life, they might all or most have only microbial life, and with no other examples to compare ourselves with, we have no way to estimate whether we are unusual in evolving as far as intelligent life. The Drake equation is an attempt to answer this question, but without more knowledge, any numbers put into that equation are speculative. The science of extraterrestrial life in all its forms is known as exobiology.""

Clarification of Drake quotation in the "Recent History" section
This is not a hard physics article so for the benefit of the lay readership, Drakes quotation "All we know for sure is that the sky is not littered with powerful microwave transmitters" requires one clarification since it omits the the following context:

Microwaves are a form of electromagnetic wave and so are limited by the speed of light: a caveat to Drake's correct observation is that such signals may simply have not reached us yet (or ceased transmission before humanity started looking for them).

This is hardly an unsourced opinion. The finite light speed (c) of all electromagnetic communication is a scientific fact. However the lay reader may not be aware that this applies to microwaves. It is therefore a reasonable edit.

— Preceding unsigned comment added by 27.253.56.6 (talk) 01:06, 16 December 2016 (UTC)


 * By that reasoning, we should make notations about all elements of electromagnetic radiation that aren't radio, lest they assume otherwise. No, at some point we just have to trust that readership can figure some things out without having everything explained in a single article. — Huntster (t @ c) 02:22, 16 December 2016 (UTC)

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Removed misleading statements from Mars section
The Mars section said that Phoenix found subsurface water - not true, it only found ice scraping the surface. It did find evidence of global exchange of oxygen over recent geological timescales with the atmosphere which probably means liquid water close to the surface. The other main thing is that droplets of what looked like a liquid formed on its legs - now thought to be probably liquid brines due to contact of salt with ice thrown up during the landing. Those could be mentioned.

Also removed the bit about gullies forming as signs of recent liquid water. The gullies did form, but now most think they form due to dry ice phenomena - there still is a liquid water hypothesis but as only one of many it's not conclusive enough to have such prominence. There is evidence of liquid brines in the warm seasonal flows already linked to. I could add more to this section depending how long we want it to be but thought it was most important to remove inaccurate misleading information right away. Robert Walker (talk) 03:11, 5 March 2017 (UTC)

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Indirect search
The first paragraph of "Indirect search" goes into discussion of SETI, which is a valid topic on its own, but its a search for intelligent life, while the rest of this article does not focus on intelligent life. I suggest that the mention of SETI may be placed somewhere else, as if dilutes this discussion. Kortoso (talk) 20:23, 31 October 2017 (UTC)

Extraterrestrial.
Accordind to the National Bord Of Inturnal-Trialstial, it is said that there is another - Lifeform in the (StarWarsWeaponsPrograms). All in all, It speaks. ( # 569 )000 — Preceding unsigned comment added by 205.153.48.25 (talk) 20:27, 2 January 2018 (UTC)