Disclosure may not reveal alien visitors, but it will reveal something equally important: how science, measurement and ...

In a combative State of the Union speech - the longest in modern history at about 108 minutes - President Donald Trump defended his administration's economic performance and hardline immigration ...

As President Trump delivered his State of the Union address, reporters from across NPR's newsroom, are fact checking his ...

Most people alive today carry fragments of Neanderthal DNA in their genome. Now scientists are gaining a more intimate ...

Can NASA and Elon Musk get us to Mars and beyond?

Geneticists have a better understanding of how prehistoric pairings unfolded, with new research suggesting they were mostly between male Neanderthals and female humans.

Fact-checkers delivered a mixed verdict on Trump's State of the Union address, confirming immigration claims while disputing voter fraud and Medicaid statements.