Jupiter’s Galilean moons, Europa, Ganymede, Callisto, and Io, have long been subjects of intense scientific scrutiny, ...

NASA’s Europa Clipper mission will perform 49 close flybys of Jupiter’s icy moon, where radiation levels reach 5,400 milliSieverts per day — lethal within hours. Beneath its frozen crust may lie a ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...

If you’re interested in extraterrestrial life, these past few years have given an embarrassment of places to look, even in ...

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist ...

Astrobiologists say we could find evidence of microbial life within the next 10–20 years. What does that mean? Where are we ...

If life exists elsewhere in the universe, researchers at the University of Washington are finding the clues on Earth to help ...

President's quick-fire-round answer has led to a flurry of comments.

But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

Learn how cold-water geysers on Earth could give scientists a clear path in the search for extraterrestrial life on icy moons.

Astronomers have detected a smelly gas best known for the odor of rotten eggs—hydrogen sulfide—in the atmospheres of four giant planets far beyond our solar system. While the gas may be unpleasant on ...

The odds are that life is out there – but rather than little green men, it may look more like hydrothermal vent tubeworms ...