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

The mystery of Peru's "conehead" mummies has baffled scientists for decades, and new DNA tests on the mummies' teeth have ...

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

UFOs have long been a central theme in popular culture. TV shows and films from "Mork and Mindy" to the "X-Files," from "E.T." to "Men In Black," and music bands from the Carpenters to Radiohead, have ...

It's World UFO Day, but questions about aliens, UFOs and what governments know about them remain. UFO researcher Jon Stewart ...

Astrophysicist challenges UAP claims, urges government to show proof of alien life. Miriam Espacio/Unsplash Astrophysicist and ...

The International Academy of Astronautics has updated its protocols for confirming and announcing the discovery of alien life.

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common ...

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In 1995, a grainy black and white film claiming to show the autopsy of an alien was broadcast to more than a billion people ...