The nature of time is an age-old conundrum for physicists, philosophers, biologists and theologians. The Newtonian picture of time—a kind of cosmic clock that ticks off time in a manner that applies identically to everyone and everything—tightly aligns with our experience. But with special and general relativity, Einstein showed the fallacy inherent in experience: the rate at which time elapses depends on circumstance and environment. These discoveries raise even more basic, long-standing puzzles: What is time? Is it a fundamental feature of reality or something we humans impose on experience? Does time come into existence with the universe or does it transcend it? Why does time exist at all? The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest Original Program Date: June 02 2013 MODERATOR: Ira Flatow PARTICIPANTS: Paul Davies, Craig Callender, Tim Maudlin, Max Tegmark Ira Flatow's Introduction 00:00 Participant Introductions 1:03 How did Einstein get involve with time? 3:36 What is the symmetry of time? 8:20 What was Einsteins concept of time? 10:09 Tim Maudlin has his own opinion on time. 12:42 How do you prove time dilation? 16:40 Can we look at the cosmos and see gravity's effect on time? 22:34 By moving faster we can travel forward in time? 29:03 If the universe is expanding what is it expanding into? 35:58 What does the universe look like? 40:38 Is time an illusion? 45:28 Does time flow? 49:16 Does time pass in a specific direction? 1:01:38 The geometry of spacetime. 1:04:35 The flow of time vs the time asymmetry.1:11:45 If it's fact that time passes then does Einstein agree? 1:17:09 What is the experimental evidence? 1:24:13