But what if the most clandestine intelligence program in U.S. history was shut down not because it failed, but because it had ...

On the cracked ice of Jupiter’s moon Europa, a sprawling pattern of dark lines has taken on an unsettling nickname: a “demon” ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

As NASA plans for long-term human missions beyond Earth, one question keeps resurfacing: how do you sustain life in places ...

Scientists are to send a spacecraft to hunt for aliens potentially hiding in our solar system. The European Space Agency (ESA) has announced a mission to Saturn's moon Enceladus, as it has all the ...

Scientists are to send a spacecraft to hunt for aliens potentially hiding in our solar system. Get any of our free email newsletters — news headlines, sports, arts & entertainment, state legislature, ...

As number of lunar satellites soars, sites will be marked out where defunct hardware can be crash-landed ...

Scientists searched 27 exoplanets for alien technology using planetary eclipses, revealing a new way SETI hunts signals ...

Interstellar object 3I/ATLAS has grown a colossal, sunward anti-tail larger than the distance to the moon. Is this an ...