Scientists believe all life on Earth may descend from a single ancient organism known as LUCA — the Last Universal Common Ancestor. Emerging more than 4 billion years ago, this primitive life form ...

WASHINGTON -- Famed astrophysicist Stephen Haw-king has been thinking a lot about the cosmic question, "Are we alone?" The answer is probably not, he says. If there is life elsewhere in the universe, ...

NASA's Europa Clipper probe blasted off from Florida on Monday, bound for an icy moon of Jupiter to discover whether it has the ingredients to support life. Is there anywhere else in our solar system ...

Primitive life forms thrived on Mars around the same time prehistoric life was developing in Earth’s oceans — but the Red Planet’s denizens doomed themselves, a new study suggests. Mars’ ...

We humans have long viewed ourselves as the pinnacle of evolution. People label other species as “primitive” or “ancient” and use terms like “higher” and “lower” animals. This anthropocentric ...

Scientists from NASA, the SETI Institute and other institutions will study microscopic life forms in some of the highest lakes on Earth atop a South American volcano to learn what life may have been ...

Electrical storms, rather than meteorites as scientists had previously thought, could have unlocked phosphorus necessary for the development of ancient life, according to a new study. Survey data ...