If our astronauts are to remain healthy on longer missions, their immune systems need a little something to grapple with.

P at Bunker was trying to figure out where he was at.

Astronomers are ready to search for the fingerprints of life in faraway planetary atmospheres. But first, they need to know ...

Scientists have created a new 3D map of "mega ripples" on the seafloor caused by the Chicxulub asteroid impact that wiped out ...

The intriguing chemistry of a rock collected by the Perseverance rover could trace to microbial activity — or not.