In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from the first time people have reported seeing inexplicable lights in the sky.

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth.

Move over Hollywood stars — Angelenos are apparently spotting far stranger things in the sky these days. Just hours after the Pentagon released more than 160 newly declassified UFO files teased by ...

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No bombshells so far in the latest Pentagon batch of declassified Unidentified Anomalous Phenomena files. But they show the CIA hid its involvement.

Add Yahoo as a preferred source to see more of our stories on Google. The Trump administration released the first batch of long-promised files related to UFO sightings on Friday. The 162 files — ...

Harvard researchers propose the cryptoterrestrial hypothesis, suggesting UFOs might indicate hidden civilisations on Earth, ...

From Nevada’s Area 51 mythology to McMinnville, Oregon’s UFO Fest, alien lore continues to turn curiosity, conspiracy, and ...

This memo is out of this world. Mysterious sightings of ‘three to four-foot tall’ beings decked out in space suits and helmets were reported by witnesses decades ago, newly released Pentagon files ...

Professor Avi Loeb gained prominence in 2017 after the discovery of ‘Oumuamua, the first known interstellar object to pass ...