Life on the International Space Station isn't always easy. There's not a lot of room, no showers, and no laundry. Photos show ...

One such moment was when space craft sent back images of the Earth for the first time. Another is the discovery of life on ...

When astronomers search for evidence of life beyond Earth, what signs are they seeking ... here are some of Pettit’s awe-inspiring images from his seven-month stay on the orbiting laboratory ...

A groundbreaking discovery has revealed that Mars’ surface shares striking similarities with Earth’s coldest regions.

Wildlife filmmaker Bertie Gregory curated the final selection for the "NatGeoYourShotOurHome" challenge from thousands of ...

Elon Musk is taking the long view. The billionaire SpaceX founder has long said that humanity needs to expand its footprint ...