If alien civilizations rise and fall, they may leave behind artifacts long after they are gone. From abandoned megastructures ...

The History Channel series returns January 15 with "Skulls of the Gods," examining whether these archaeological finds have ...

In the 1970s, author Erich von Däniken was a household name, not only in his native Switzerland, but also in the U.S. and around the world. His 1968 book "Chariots of the Gods?" promoted the idea that ...