One night about 60 years ago, physicist Enrico Fermi looked up into the sky and asked, "Where is everybody?" He was talking about aliens. Today, scientists know that there are millions, perhaps ...

An enormous rectangular-shaped 'structure' has been spotted on a map of the seafloor, sparking theories that an alien base ...

New images of 3I/Atlas, captured by Satoru Murata, went viral, sparking speculation about alien structures. A viral image taken by an amateur astronomer has triggered uproar online after viewers ...

Off the coast of Chile there’s an island filled with mysterious monolithic structures that hold secret powers. See more in this clip from Season 21, Episode 2, "The Top Ten Mysterious Monoliths." ...