The idea of going forward or backwards in time is something that nearly everyone has at least fantasized about at one time or another. Hundreds of essays, books, and movies have been written based on the idea of leaving our current place in time and visiting another. The big question is, of course, is it possible? Physicists and philosophers have discussed, theorized, and challenged each other’s theories for years. We’ll share the most popular ones, and invite you to call in and share yours as well.