A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.

The US Government has released a new trove of documents on cases of "unidentified anomalous phenomena" (UAPs)—many of which would have been described in the past as unidentified flying objects or UFOs ...

'Interdimensional' mostly refers to entities from parallel dimensions; they don't travel vast distances, but they are believed to manipulate space-time. Stephen Leonardi: Pexels The long-promised ...

Add Yahoo as a preferred source to see more of our stories on Google. The Trump administration released its newest batch of UFO documents last week, revealing over 160 files that include videos, ...

Experts say the videos released by the US government give no evidence of alien technology or extraterrestrial life.