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 ...

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

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

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 ...

Christopher Nolan's sci-fi masterpiece Interstellar shares similar themes as great literary works like Carl Sagan's Contact ...

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

If alien life exists, its absence from our instruments may have several very different explanations. The longer the silence continues, the more interesting the mystery becomes.

Three Indigenous studies scholars draw from colonial histories and explain why listening for alien life can have ethical ...

"...Should I go shopping today, too?" He used a calendar. So he knew that today was January 1st, 2101, the momentous New Year ...