A smile is contagious and spreads from mouth to mouth, especially between two smitten partners. If your other half mirrors ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

As much as Steven Spielberg likes aliens, he seems to prefer holding them at arm’s length. The creatures in Close Encounters ...

A published report says a U.S. fighter pilot whose aircraft was downed in Iran earlier this year shared a startling account ...

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

The Supreme Court on Tuesday made it far more difficult for foreigners to bring lawsuits in U.S. courts alleging serious ...

The main focus of the trip is to study the effects of long-term spaceflight on the body, but the test is also a side mission.

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

For decades, the question of whether life exists beyond Earth has been the domain of science fiction writers and late-night ...

Vince Gilligan's "Pluribus" is a must-watch series on Apple TV, and it takes cues from some of the best sci-fi movies, like ...