A Catholic nun made a startling assertion about UFOs, cautioning that purported alien encounters are in fact a menacing ...

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

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White ...

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 ...

There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer ...

First, there was the release of the so-called UFO files by the Trump administration in May, which sparked a wide range of reactions from religious Americans. Then there was a new blockbuster summer ...

The recent discovery of an enigmatic substance on the surfaces of both Titan, Saturn’s largest moon, and Pluto, our solar ...

A study suggests that stellar plasma may distort alien signals, complicating SETI's search for extraterrestrial life by ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

A provocative study suggests that Jupiter’s frozen moon Europa may not only be hospitable, but that life from Earth could be ...