Ancient Aliens

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. But are they more than just a pop culture creation?

He is one of the most prolific inventors of the 20th century -- and the man that actually electrified the world. But could that have been by some otherworldly design?

It has been called the key to the universe and possibly the most important scientific breakthrough of all time. Could the so-called God Particle reveal the truth about our origins? And was it left on Earth by extraterrestrial beings?

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 superhuman strength, supersonic speed and supernatural abilities. Are these stories based on extraordinary -- and possibly extraterrestrial -- beings that live on Earth?

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

A 2,000-year-old computer ... a power plant inside the Great Pyramid ... and a Nazi-era time machine with roots in ancient history. Did ancient man have access to extraterrestrial technology?

All over the world there are megalithic stone structures whose construction baffle stonecutters, scientists and archaeologists. Is it possible that ancient humans managed to move and cut these gigantic rocks with the help of alien technology?

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 actually have seen extraterrestrial crafts descending from the heavens?