Most scientists today agree that at least some water existed on the surface of Mars during the Noachian epoch, roughly 4.1 to 3.7 billion years ago.

Across NPR's website, you'll find headlines of all kinds: Some pose a question, others point readers to very practical ...

Scientists have designed a 'cosmic radio' detector which could discover dark matter in 15 years. Published today in Nature, scientists at King's College London, Harvard University, UC Berkley and ...

Firing a well-respected manager roughly 20 games into the season would be premature. However, if the Minnesota Twins keep ...