Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant ...

This second set of remains belonged to what the world would come to know as the Starchild Skull. For nearly a century, this artifact has served as a battlefield between those who believe in ...

The desolate, wind-swept desert of the Paracas Peninsula on the southern coast of Peru holds one of the most enduring mysteries of the ancient world. In 1928, the renowned Peruvian archaeologist Julio ...

It was not the rolling stone they thought it was. It remains a mystery exactly how Stonehenge’s titanic Altar Stone arrived ...

In February 1959, a group of hikers died in the mountains. The events sparked theories both scientific and conspiratorial.

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets price the odds of the U.S. confirming aliens before 2027 - here’s why traders overwhelmingly expect a government ...

The unnamed peak in Antarctica’s southern Ellsworth Mountains looks almost engineered from above: four steep faces, a clean ...

Disclosure Day' director Steven Spielberg thinks we're not alone in the universe. He's not the only one.