Researchers say they have discovered an entirely new class of life inside the human body, and it is very similar to a virus.

Samples from asteroid Bennu have delivered insights into the origins of Earth’s water and the organic molecules that may have ...

NASA scientists have uncovered significant changes in the global water cycle over the past two decades, largely driven by ...

This week, explore what lurks in asteroid dust, marvel at the world’s largest beaded burial, discover an elusive creature ...

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.