Scientists, historians and archaeologists attempt to unravel the greatest mysteries of history.

Investigating significant historic and contemporary sites from the revealing vantage points of drone, satellite, and aerial photography.

This documentary series scours the planet for the weirdest alien encounters ever recorded.

Conspiracy Files: Unsealed investigates the previously top-secret files made public by the Freedom of Information Act. Based on the new information discovered, the show re-examines faulty assumptions and searches for inconsistencies.

Series exploring the weird history, weird legends and weird locations of the UK.

In an effort to gain a broader perspective and build larger data sets, the Skinwalker team adds two team members and takes the offensive by pursuing evidence of similar phenomena found at analogous sites around the country.

The Holy Lance is one of the sacred relics of Christianity. From Jerusalem to Istanbul, Paris, Vienna and Rome, this film combines scientific investigation with the latest historical research to explore the two thousand year-long history of this artifact.

Throughout history, secret societies assemble for mysterious purposes, below the surface, under lock and key, in the darkest corners around the world.

With the recent declassification of military records, service members are coming forward for the first time to share stories of unexplained events.