President Donald Trump congratulated NASA astronaut Peggy Whitson from the Oval Office on Monday on her record-breaking stay aboard the International Space Station.

Running low on fuel, NASA's Cassini spacecraft has begun the final (and most daring) phase of its epic mission to Saturn.

Commander Peggy Whitson and Flight Engineer Jack Fischer, both NASA astronauts, conducted the milestone.

We are changing space itself.

NASA has chosen 12 new astronauts from its biggest pool of applicants ever. Vice President Mike Pence attended Wednesday's announcement of the Astronaut Class of 2017 at Johnson Space Center in Houston. More than 18,300 people threw their hats into the space…

Newly discovered fossils indicate Homo sapiens were present in Africa 300,000 years ago, scientists reported. Until now, the earliest evidence dated back just 195,000 years.