A recently discovered "super Earth" located around 25 light-years from our planet is not as massive as previously thought, ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

Three decades of finding new worlds Exoplanet science has moved fast since the first confirmed discoveries in the 1990s.

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow the search for potentially habitable planets beyond Earth.

Many have watched recently released UFO videos, but most still think the government knows more than it is saying.

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...

The first sign of possible extraterrestrials detected in the cosmos didn't come in the form of little green aliens flying around in saucer-shaped spacecraft. In fact, the life that could be – emphasis ...

Add Yahoo as a preferred source to see more of our stories on Google. FILE - Deputy Director of Naval Intelligence Scott Bray points to a video display of a UAP during a hearing of the House ...

LOS ANGELES (AP) — What was once considered fringe or conspiratorial has in recent months popped up everywhere from the White House to the Catholic Church, as public fascination with unidentified ...