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

UFO reports keep returning for reasons that are more complicated than they first appear. A small number of cases continue to ...

Experts believe ancient alien civilizations have been living on mars. See more in this clip from Season 1, Episode 7, "Mystery Hum and Mayans on Mars." ...

A group of experts provided their own estimates as to when actual proof of alien life will be discovered. According to the scientists, it is possible that traces of alien life will be found on Mars or ...

The idea that extraterrestrial intelligence could be observing Earth sounds like science fiction, and there is currently no verified evidence that it is happening. But scientists do take a related ...

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn ...

Since the late 1940s, tales of UFO sightings have become more and more common. Alongside these claims have come countless photos. Many are quite clearly fakes made by attention-seekers, but a few have ...

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 ...