Biologists are quietly rewriting what it means to be alive, and the human body has become one of their strangest frontiers.

Biologists mapping the human body have long assumed that every major kind of microscopic life inside us already had a place ...

CAPE CANAVERAL, Fla. (AP) — Ancient Mars may have had an environment capable of harboring an underground world teeming with microscopic organisms, French scientists reported Monday. But if they ...

Despite being among the simplest forms of life on Earth, cyanobacteria are able to anticipate and prepare for the changing seasons based on the amount of light they are exposed to. It has been known ...

Evidence was found in marine sedimentary rocks near Gabon in Central Africa. A team of international researchers has challenged the long-held belief that complex life forms first emerged on Earth 635 ...