If I were looking at Earth from a distance, I would be pretty disappointed,” theoretical physicist Avi Loeb says. “Most of ...

His job was to uncover secrets from the unknown. But his curiosity opened doors that the government preferred to keep closed.

A rare stargazing spectacle will unfold on Friday, April 13, 2029, as the asteroid Apophis passes closer than satellites over Europe and Africa.

UFOs, or the notion of them, have been around a long time. Here’s a look at how the various iterations of the subject — from ...