Donald Trump’s pledge to release official files relating to UFOs has intrigued conspiracy theorists who suspect the US government has hidden evidence of alien activity on Earth.

Former President Barack Obama ignited a firestorm when he seemed to admit aliens were “real.” Congress has explored the topic ...

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...

Planet K2-18b, an apparent water world 124 light years away, has been seen as a promising location in the search for aliens, ...

More than 2,500 alien plant species could find suitable conditions in the Arctic, especially in northern Norway and Svalbard.

Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million people banded together in a real-time search for aliens -- with screensavers.

Two rival teams — one using machine learning, the other human eyes — race to find the first spacecraft to soft-land on the moon.

This video reacts to the Kurzgesagt episode about aliens under the ice and the possibility of life on rogue planets drifting through space. It explains how frozen worlds hidden oceans and internal ...

Long before Sputnik launched, something else may have already been orbiting Earth. Known as the Black Knight Satellite, this mysterious object has sparked theories of alien observation, ancient ...

Since the first Search for Extraterrestrial Intelligence (SETI) experiment in 1960, scientists have been scanning the Milky ...

For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...