NASA's Europa Clipper mission has launched to study Jupiter's icy moon Europa, which may harbor a potentially habitable ocean beneath its surface.

A world-leading designer of space robots says gigantic new rockets being tested by billionaires Elon Musk and Jeff Bezos are ...

There might be a type of exoplanet without dry land. They're called "Hycean" worlds, a portmanteau of "hydrogen" and "ocean." ...

When searching for alien life, it’s not unusual to use Earth as a test bed for theories and even practice runs. Perhaps one ...

The biggest stories of the day delivered to your inbox.

Given the foregoing, Israel should remain the only country with nuclear weapons in the Middle East, as long as its nuclear ...