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The young electrical engineering student disappeared after claiming to create a time machine.

So far, no one can explain what these brands are and what their origins.

St. George's Church is one of eleven monolithic churches carved directly into the rock in Lalibela, Ethiopia.

Treasure hunters have searched for the Holy Grail for centuries, and hundreds of people have claimed to possess it.

A comet recorded by the Aztecs appears to have foreshadowed the arrival of the Spanish conquerors.

Scientists have come up with 12 hypotheses why we haven't detected signs of alien civilizations yet.

NASA has already recorded bursts of radiation from the Sun that could kill a human, but that was in 1972 and would only hit astronauts in orbit.

In the days leading up to the Chernobyl disaster, workers at the nuclear plant claimed to have seen a creature known as the “Black Bird”.