Did Da Vinci hide clues in his art? - Digging For The Truth | Sky HISTORY TV Channel

Did Da Vinci hide clues in his art? - Digging For The Truth

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What (or perhaps who) is the holy grail? And could a descendant for Jesus and Mary be walking the streets today? (Season 2, Episode 4)

Colossus statue at the tomb of an Ancient Egyptian pharaoh

Ancient Egyptian statues start the day with a song - Phantom Signals

Pink sound wave recordings

Did the US Army use ghost recordings to terrify the Viet Cong into submission? - Phantom Signals

Buildings appear to float in the clouds

A city appears to float among the clouds - Phantom Signals

Atomic bomb explosion

We'll all be dead if this signal ever stops - Phantom Signals

A triangular-shaped UFO coming down

Witness accounts of an alien spacecraft - Ancient Aliens

A portal carved into the side of a stone wall

Does this ruin contain a portal to another universe? - Ancient Aliens