Dr. Florin Diacu, Professor of Mathematics at University of Victoria, British Columbia Canada, joins us to talk about his book The Lost Millennium: History's Timetables Under Siege. This is a fascinating thesis that, if correct, might upset the entire historical timetable. Have you ever wondered how we really know what year it is? Part detective story, part conspiracy theory, part scientific history, The Lost Millennium explores the astonishing possibility that our calendar is out by a thousand years.