If you believe the world’s leading physicists, the vast majority of matter in the universe is hiding in plain sight. For nearly a century, evidence has mounted that the gravitational pull necessary to keep clusters of galaxies intact, as well as stars within galaxies from flying apart, requires far more matter than we can see—matter, according to the experts, that has eluded our telescopes, because it does not give off light. Problem is, such “dark matter” has also eluded one specially designed detector after another that researchers have deployed to catch it. Which raises the big question: What if we have failed to find dark matter because it isn’t there? Join leading physicists on a scientific treasure hunt that has proved more challenging than anyone expected, and may ultimately require rethinking some of our most fundamental ideas about the universe. This program is part of the BIG IDEAS SERIES, made possible with support from the JOHN TEMPLETON FOUNDATION. PARTICIPANTS: Mariangela Lisanti, Joseph Silk, Erik Verlinde, and Risa Wechsler MODERATOR: Brian Greene TOPICS 00:00 - Introduction to dark matter 10:55 - Panelist introductions 12:28 - How do we explain motion in the universe? 16:35 - Is the “dark stuff” ordinary matter? 22:43 - Supersymmetric particles 30:06 - Weakly Interacting Massive Particles 33:14 - Searchng for WIMP dark matter 37:25 - What is the role of dark matter in the structure of the universe? 43:23 - Cold vs warm dark matter 46:54 - The “dark sector” possibility 52:56 - Expanding our understanding of gravity and thermodynamics 1:01:34 - Is there a connection between dark energy and dark matter? 1:07:36 - Why do galaxies rotate? 1:14:25 - Future predictions for the discovery of dark matter PROGRAM CREDITS - Produced by Laura Dattaro - Associate Produced by Peter Goldberg - Music provided by APM - Additional images and footage provided by: The Dark Energy Survey, SLAC National Accelerator Laboratory - Recorded at the Gerald W. Lynch Theatre at John Jay College MORE INFO ABOUT THE PROGRAM AND PARTICIPANTS: https://www.worldsciencefestival.com/programs/physics-dark-searching-universes-missing-matter/ - SUBSCRIBE to our YouTube Channel and "ring the bell" for all the latest videos 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