Aldrin, 96, the second person to walk on the moon, said during a technical crew defriefing one week after the Apollo 11 crew returned to Earth that they observed three oddities. His statements were released in a UFO-related documents dump by the Pentagon on Friday.

A chilling newly released FBI memo reveals how a young informant who reported seeing a UFO “feared for her life” because others who’ve seen them “have died mysteriously” in the past. The anonymous woman told officials she met an alien creature in July 1967,

Perspective: As things stand, the files say implicitly what officials won't explicitly. For now, it's all aboard the intergalactic hype train.

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth.

The president's interest has been embraced by a small group of Republicans in Congress who say the Pentagon has failed to provide transparency around mysterious aircraft reported near U.S. military installations.

Elon Musk has once again jumped into the alien debate, offering a straightforward take on one of the internet’s favourite topics: UFO sightings. In a recent clip that has gone viral, Musk said that although strange objects in the sky often make headlines ...