I saw this video-clip at Studio 360, one of the links on this blog. The layers in this discussion doesn't end; they all converge in many surprising ways. A gift for this new year. HipHop-Physics-Theory-Relativity-Cosmology-Etc. Comedian-Musician Reggie Watts, Columbia University Professor Janna Levin, Professor Maiullo, and Host Kurt Andersen are great.