Ancient cultures throughout the Mediterranean recorded stories of enormous beings that descended from the sky. Could massive megalithic structures and reported discoveries of towering human-like skeletons reveal that this part of the world was once inhabited by giants?

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We’re counting down the world’s top ten alien encounters, from the first reported abduction event to mass UFO sightings over New York’s Hudson Valley to an incident in ancient Rome that changed the course of human history. Could these incredible accounts be actual encounters with visitors from the stars?

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The mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork found all over the planet. Could this cryptic shape represent a profound connection to the cosmos? And is it a clue that was left behind by extraterrestrials who visited Earth thousands of years ago?

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