Archaeologists are continuously unearthing artifacts and sites that defy the conventional timeline of human history. Is it possible that an alien civilization inhabited Earth thousands of years ago?

Is it possible that German-born aerospace engineer Wernher von Braun-one of the greatest rocket scientists the world has ever known-found his inspiration not on our world, but another?

In the 21st century, robots are being programmed to do everything from performing surgery to exploring other planets. Are they pointing the way to mankind's future...or to its past?

Good and Evil. Light and Dark. God and Satan. In nearly every culture there are stories of opposing forces at work here on Earth. Could these forces really exist? And if so, what is their true nature?

Could it be that many of the divine beings depicted in cultures throughout the world reflect extraterrestrial visitations that our ancestors did not understand?

Since the launch of the Kepler Telescope in 2009, scientists have identified thousands of planets capable of supporting life. Is it possible we aren't alone in the universe?

In 2014, Russian cosmonauts aboard the International Space Station discovered living sea plankton covering parts of the windows. If sea life can thrive in space, might the reverse be true as well?

Over 10,000 crop circles have been reported worldwide, appearing in 50 different countries, and nearly every continent on Earth. Critics say that they are all part of an elaborate hoax. But are they?

Might the United States military have a secret space program? And if so, are we preparing for a space-based war with other nations-or other species?

Due to warfare, instability and inaccessibility there are specific regions of the world that are off-limits to exploration. Could the truth about our alien past be located at these forbidden sites?