Experts believe ancient alien civilizations have been living on mars. See more in this clip from Season 1, Episode 7, ...

A new study proposes searching the moon for remnants of ancient extraterrestrial technology. Researchers suggest the moon's surface could preserve microscopic "technosignatures" left by alien ...

Some UFO cases remain difficult to explain, but that is only the beginning of the scientific question. The evidence needed to ...

Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Sci-fi might be the best genre in cinema, addressing topical concerns while presenting daring ideas, and movies like ...

The mathematical certainty that 'they' definitely exist in the universeWhen looking up at the night sky, everyone has surely ...

What if the aliens aren’t coming from space because they never left Earth? Enter the Cryptoterrestrial Hypothesis, the ...

Researchers earlier this month said they used the MeerKAT radio telescope in South Africa to detect radio waves on Beta Pictoris b.

In the coming month, humans are going to experience their first encounter with an alien civilization as predicted by blind ...

The physicist explained what he finds so terrifying about the prospect of us being alone in the universe ...