The Druids of ancient Celtic culture have long been shrouded in mystery, often depicted as wise priests, sorcerers, or even human sacrificers. But how much of what we "know" about them is true?

Theories about who constructed Stonehenge range from Druids to aliens ... 3000 B.C.E., this discovery adds a whole new layer to the mystery of who built Stonehenge. Beginning around 3000 B.C.E ...