The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

From underground societies to futuristic conspiracies, these sci-fi series capture the mystery and immersive storytelling that make Silo so compelling.

A diver with a bowl recovered from the Tiwanaku site. (Teddy Seguin) The mysterious Inca Empire is a source of endless ...

Are aliens real? Was Fox Mulder right all along? We examine the prediction markets to gauge if the U.S. government will confirm that aliens exist before January 2029. The prediction market on a U.S.

At its peak, the ancient Indus River Valley civilization featured gridded streets, multistory brick homes, flush toilets and bustling shops. Its people traded gold, precious stones and items such as ...