WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a team of outside scientists to study the national security ...

Case in point: Scientists from Tokyo University and Hokkaido University in Japan stumbled across some mysterious jet-black ...

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 ...

Hidden deep within southern Siberia lies one of the most mysterious places on Earth. At first glance, Lake Baikal looks like ...

A newly spotted interstellar visitor just got an unusually close listen from California scientists — in a search for signs of ...

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

God and aliens are having a moment. But what do Christianity and other faiths really teach about ETs?

Throwing back to a bygone era full of bootlegs.

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

It’s the 70th anniversary of “Forbidden Planet,” a science-fiction movie set in the 23rd century whose imaginary “Monsters from the Id” provide important lessons for the 21st ...

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