User talk:90.240.103.97

April 2020
Please do not add or change content, as you did at Cosmology, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. ''Please do change material without giving an explanation and quoting sources. Thank you.'' David J Johnson (talk) 10:25, 23 April 2020 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.