It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis.

Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville 20850, Maryland, United States ...

The order of the Ministry of Information and Broadcasting, directing the removal of a cartoon featuring the Prime Minister, Narendra Modi, from a Tamil magazine’s website, is unwarranted and may ...

Sign up for our newsletter to get updates to your inbox, and also receive offers from us, our affiliates and partners. By signing up you agree to our Privacy Policy ...

Tony Doris, the editorial page editor at The Palm Beach Post, was fired after he selected a cartoon that drew criticism from a nearby Jewish organization. Tony Doris was the editorial page editor ...