Nasa has completed the assembly of the Nancy Grace Roman Space Telescope. This mission will map the universe 100 times faster than Hubble.

When Kenneth Arnold spotted nine crescent-shaped objects flying near Mount Rainier on June 24, 1947, he described their movement as like “a saucer skipping across water.” Newspapers coined the term ...

Unknown, at the time, to former President Barack Obama, his two words on a podcast earlier this week sparked a viral ...

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist ...

Mars presents one of the strangest sights in the solar system: a blue-tinted Sun setting against a red sky. This episode explains the physics behind this eerie phenomenon, from fine dust particles to ...

Sky This Week is brought to you in part by Celestron. Friday 20Once the waxing Moon sets this evening, its disappearance ...

For more on this morning's main stories, listen to Cheat Sheet with Sophy Ridge and Wilfred Frost. For live updates ...

It comes just hours after the US president accused Barack Obama of revealing classified information when he said that aliens ...

President Trump directed his administration to release files on UFOs and any "alien and extraterrestrial life," an issue that has drawn decades of fascination — and spawned more than a few wild ...

President Trump alleged Thursday that former President Barack Obama revealed “classified information” — a potential crime — when he said that aliens are “real” in a recent interview.

President Trump alleged Thursday that former President Barack Obama revealed “classified information” — a potential crime — ...

Our strange new world, which has left humanity both hyper-connected and desolate, requires our full participation. We should want to make a good impression, after all.