Richard speaks with an author/researcher about the possibility human civilization may have been periodically modified and refined as a species.  Has our genetic make-up been manipulated by otherworldly beings that view human civilization as one big lab experiment? GUEST: Nick Redfern is an author, lecturer, and journalist who writes about a wide range of unsolved mysteries, including Bigfoot, UFOs, the Loch Ness Monster, alien encounters, and government conspiracies. He is the author of numerous books including Top Secret Alien Abduction Files;The Slenderman Mysteries;and Bloodline of the Gods