First of all, congrats on 400 episodes; it's hard to believe you could stay at this for so long! I think my time travel experience would be kinda boring. When I studied history I was often frustrated by the fact that so many volumes of ancient history were lost, or that many works of ancient poets have not survived. Much of what we know has come from pictures on shards of pottery or inscriptions on coins, and the remains of people fossilized when Vesuvius erupted. So I think I would travel back 2,000 years to ancient Rome and gather all of the writings I could carry. Or maybe I would visit the ancient library at Alexandria and plunder every last scroll I could transport back to the present to preserve all of that lost knowledge for posterity. Oh, and I would probably find time to sit down and chat with Jesus Christ to find out what he was all about, too.