Ancient Aliens

Ancient cultures around the world tell stories of strange objects witnessed flying in the sky. But are these tales fiction, or might people living thousands of years ago.

All over the world there are megalithic stone structures whose construction baffle stonecutters, scientists and archeologists.

A 2,000-year-old computer... a power plant inside the Great Pyramid... and a Nazi-era time machine with roots in the ancient history.

Throughout history, there are stories of strange beings unlike anything known to exist on Earth. Could they be more than just mythology?

The Reptilian alien is a fixture of science-fiction, from H.P. Lovecraft's tales of Valusians to the Cardassians in Star Trek, to the Visitors of the television series V.

He is one of the most prolific inventors of the 20th century--and the man that actually electrified the world.

It has been called the key to the universe and possibly the most important scientific breakthrough of all time.

Strange encounters accompany many of history's major events. Is it merely coincidence? Or might it be evidence of extraterrestrial intervention?

From the beginning of recorded history, humans have told stories about beings with super-human strength.