
History's Greatest Mysteries
The Holy Grail is the most sought-after relic in the world and is said to hold powers of healing.

The Holy Grail is the most sought-after relic in the world and is said to hold powers of healing.

Booth family members share family lore, and what they believe is evidence of the assassin's escape.

A Boeing 777, carrying 239 people, vanishes over the Indian Ocean.

Many people believe the Ark of the Covenant is out there; new clues could finally explain.

Top D.B. Cooper expert Eric Ulis believes that he's found the location where Cooper landed.

The Holy Grail is the most sought-after relic in the world and is said to hold powers of healing.

Booth family members share family lore, and what they believe is evidence of the assassin's escape.

A Boeing 777, carrying 239 people, vanishes over the Indian Ocean.

Many people believe the Ark of the Covenant is out there; new clues could finally explain.

Top D.B. Cooper expert Eric Ulis believes that he's found the location where Cooper landed.

The Holy Grail is the most sought-after relic in the world and is said to hold powers of healing.

Booth family members share family lore, and what they believe is evidence of the assassin's escape.

Theorists believe there is an alien connection to the scientific genius of famous figures.

Researchers suggest that Orion may have been a star-gate or an entry point for aliens.

The Mutual UFO Network is devoted to the scientific investigation of unidentified aerial phenomena.

Evidence could reveal that celestial objects have been directed to Earth by alien intelligence.

The possibility of direct human contact with extraterrestrial life.

The Alaskan wilderness is known for disappearances, electromagnetic anomalies and UFO sightings.

Since the dawn of aviation, pilots have experienced unexplainable events in the sky.

Theorists believe there is an alien connection to the scientific genius of famous figures.