Add Yahoo as a preferred source to see more of our stories on Google. An illustration of a watery exoplanet with a red dwarf sun overhead. A new study suggests that the exoplanet GJ 3378b, which ...

Interest in a mysterious 'lost continent' where believers claim an advanced civilization once existed has been rekindled ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Sagan's team created the greatest puzzle of all time, which you can only solve if your species understands the basic nature of the universe.

A hefty "super Earth" lurking in one of the closest star systems to our planet may be much better suited to supporting extraterrestrial life than scientists initially thought, a new study suggests.