Graham Hancock, formerly a foreign correspondent for "The Economist," has been an international bestselling author for more than 30 years with a series of books, notably "Fingerprints of the Gods," "Magicians of the Gods" and "America Before," which investigate the controversial possibility of a lost civilization of the Ice Age destroyed in a global cataclysm some 12,000 years ago. Graham is the presenter of the hit Netflix documentary series "Ancient Apocalypse." Look for the second season beginning on October 16.