Asteroid samples fetched by NASA hold not only the pristine building blocks for life but also the salty remains of an ancient ...

Two-thirds of animal and plant populations are declining in genetic diversity, which makes it harder to adapt to ...

This week, astronomers reported the discovery of a super-Earth potentially capable of sustaining life, occupying an eccentric orbit around its star that oscillates in and out of the habitable zone.

Before species go extinct, their populations often shrink and become isolated. Healthy populations tend to have a large gene pool with many genetic variants circulating. But the path to extinction ...