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Why is there something rather than nothing? And what does ‘nothing’ really mean? More than a philosophical musing, understanding nothing may be the key to unlocking deep mysteries of the universe, from dark energy to why particles have mass. Journalist John Hockenberry hosts Nobel laureate Frank Wilczek, esteemed cosmologist John Barrow, and leading physicists Paul Davies and George Ellis as they explore physics, philosophy and the nothing they share. 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 PARTICIPANTS: George Ellis, Frank Wilczek, John Barrow, Paul Davies Original Program Date: June 12, 2009 Introduction 00:19 John Barrow lecture on how nothing can be something. 03:52 Participant introductions. 28:57 Can the beginning be ranked a zero? 30:00 Empty space and virtual particles. 37:11 Does science want there to be nothing? 40:02 Zero may not be nothing. 49:16 What do you get when you test nothing? 58:48 How do you jump from there was nothing to now we can measure nothing? 01:05:01 What if there is evidence that time changes rate and direction. 01:08:30 Does consciousness change the testing of the observer? 01:12:10 What does string theory say about nothing? 01:17:40