Famed screenwriter Charlie Kaufman and theoretical physicist Brian Greene dissect time as we know it. What is the smallest unit of time, and what does it look like? For starters, you should stop looking at the clock, and start looking at the universe.
http://www.nyas.org/Publications/Media/PodcastDetail.aspx?cid=f3f02313-c697-49da-b298-9b00f2e3d541
Sir Roger Penrose is Emeritus Rouse Ball Professor of Mathematics at the University of Oxford and is the best-selling author of The Emperor’s New Mind. He is the recipient of numerous prizes and awards, most notably the Wolf Prize in physics, which he shared with Stephen Hawking for their "development of the theory of general relativity, in which they have shown the necessity for cosmological singularities and have elucidated the physics of black holes… enlarging our understanding of the origin and possible fate of the Universe." Penrose was knighted in 1994 and currently lives in Oxford, England.