In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

Jupiter's moon Europa is on the short list of places in our solar system seen as promising in the search for life beyond ...

A recent photo from NASA's Curiosity rover gives an idea of what Mars would look like under skies that resemble our own on ...

A new study is skeptical that life could still be present on Jupiter's moon Europa, where a NASA spacecraft launched in ...

Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

New research suggests that amino acids, the fundamental components of life, may have arrived on Earth carried by interstellar ...

New method reveals chemical signs of early microbial life in ancient Earth rocks, showing photosynthesis evolved much earlier ...

Asteroids, solar flares, and nearby supernovae pose real risks that could disrupt technology, economies, and life on Earth.

Scientists are using powerful telescopes to study exoplanet atmospheres for signs of life. New missions could soon reveal ...

A study has cast doubt on the idea that Jupiter's moon Europa, where NASA has sent a spacecraft, could have conditions to ...

For a long time, the end of the Ice Age felt like a slow fading rather than a sharp break. Mammoths vanished. Old ways of ...