Aliens and Monsters

S3 E2: Hindu scripture describes an enormous flying creature called a Garuda that shook the ground when it landed on Earth. Is it possible that this monster was actually a misinterpreted alien craft? Are hybrids like the Centaur, the Minotaur and Medusa just mythical creatures of fantasy - or could these ancient depictions of terrifying monsters have been the result of advanced extraterrestrial transplantation procedures?