Wikipedia:Today's second feature/September 2005

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September 1

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September 2

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September 3

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Compound eye of the Antarctic krill
Compound eye of the Antarctic krill

Electron microscope image of the compound eye of an Antarctic krill.

Antarctic krill are shrimp-like invertebrates that live in large schools, called swarms, in the Antarctic waters of the Southern Ocean. Although the uses for and reasons behind the development of their disproportionately large, black, compound eyes remain a mystery, there is no doubt that Antarctic krill have one of the most fantastic structures for vision seen in nature.

Photo credit: Gerd Alberti and Uwe Kils

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September 4

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Osteospermum 'Pink Whirls'
Osteospermum 'Pink Whirls'

Osteospermum 'Pink Whirls' is one of the many cultivars of the genus Osteospermum. It is particularly selected for its unusual flower. Its 13-18 purple to lavender-blue, 'spooned' petals around a blue disk, give the impression of an optical illusion. After a few days the spoon-like petals open up to form normally shaped petals. Most species of Osteospermum are native to Southern Africa, which gives rise to some of their common names such as African Daisy and Cape Daisy.

Photo credit: pdphoto.org

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September 5

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September 6

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September 7

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September 8

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September 9

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September 10

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Summer Solstice Sunrise over Stonehenge
Summer Solstice Sunrise over Stonehenge

Stonehenge is a Neolithic and Bronze Age monument located near Amesbury in the English county of Wiltshire. Constructed between 2500 BC and 2000 BC, it is composed of earthworks surrounding a circular setting of large standing stones, known as megaliths. Archaeoastronomers claim that Stonehenge represents an "ancient observatory," with significant alignments for the sunrise on the solstice and equinox days. In recent years, the site is a place of pilgrimage for neo-druids, those following neo-pagan beliefs and onlookers, with crowds of around 20,000 people gathering to celebrate the summer solstice sunrise.

Photo credit: Solipsist

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September 11

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Praying mantis
Praying mantis

A praying mantis is a kind of insect of the family Mantidae (order Mantodea), named for their "prayer-like" stance. (The word mantis in Greek means prophet.) There are approximately 2,000 species world-wide; most are tropical or subtropical. Mantids are masters of camouflage and make use of protective coloration to blend in with the foliage, both to avoid predators themselves, and to better snare their victims. Their diet usually consists of living insects, including flies and aphids.

Photo credit: Shiva shankar

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September 12

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September 13

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September 14

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September 15

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September 16

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September 17

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Common Snowdrop - Galanthus nivalis
Common Snowdrop - Galanthus nivalis

The Common Snowdrop (Galanthus nivalis) is the best-known representative of a small genus of about 20 species in the family Amaryllidaceae that are among the first bulbs to bloom in spring. All species of Galanthus have bulbs, linear leaves, and erect flowering stalks, destitute of leaves but bearing a solitary pendulous bell-shaped flower. Galanthus nivalis grows 15cm tall, flowering in January or February in the northern temperate zone.

Photo credit: Aka

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September 18

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Pomegranate fruit
Pomegranate fruit

The pomegranate, Punica granatum, is a species of fruit-bearing deciduous shrub or small tree growing to 5-8 m tall. The pomegranate is believed to have originated in the area from Iran east to northern India, but has been cultivated around the Mediterranean for so long (several millennia) that its true native range is not accurately known. The ancient city of Granada in Spain was renamed after the fruit by the Moors.

Photo credit: Fir0002

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September 19

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September 20

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September 21

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September 22

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September 23

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September 24

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Particle physics is a branch of physics that studies the elementary constituents of matter and radiation, and the interactions between them. In the experiment illustrated here, particles erupt from the collision point of two relativistic (100 GeV) gold ions in the STAR detector of the Relativistic Heavy Ion Collider. Electrically charged particles are discernible by the curves they trace in the detector's magnetic field.

Image credit: RHIC

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September 25

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2004 tsunami in Ao Nang, Thailand
2004 tsunami in Ao Nang, Thailand

The 2004 Indian Ocean earthquake was a magnitude 9.15, undersea earthquake that occurred at 00:58:53 UTC on December 26 2004. The earthquake generated a tsunami that killed more than 150,000 people around the Indian Ocean, making it one of the deadliest disasters in modern history. This photograph shows the tsunami as it reached Ao Nang, Thailand.

Photo credit: David Rydevik

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September 26

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September 27

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September 28

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September 29

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September 30

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(Today is Friday, May 10, 2024; it is now 08:21 UTC)