Big Picture Science is a podcast and online audio content for radio produced by the SETI Institute. The hosts of Big Picture Science are Seth Shostak and Molly Bentley. So, on this Thanksgiving, the Perpetual Notion Machine presents two clips from an episode dealing with time, time travel, and teleportation. In the first clip, guest Richard Muller, astrophysicist at the University of California, Berkeley, describes the essence of time and whether time travel is even possible. In the second clip, Seth Lloyd, professor of quantum engineering at MIT, describes an experiment in which a photon particle was teleported from one place to another and another similar experiment to test the grandfather paradox.

Check out complete episodes of Big Picture Science by clicking on bigpicturescience.org.