Add Yahoo as a preferred source to see more of our stories on Google. A rock retrieved from a near-Earth asteroid is crawling with microbial life, scientists have discovered. But the bacteria on its ...

Could ancient alien technology be hiding on the Moon? Scientists propose searching lunar dust for microscopic traces of distant civilizations.

Asteroid samples fetched by NASA hold not only the pristine building blocks for life but also the salty remains of an ancient water world, scientists reported Wednesday. The findings provide the ...