Brian Greene and Michael Levi discuss revolutionary observations that may upend our cosmological understanding. This program is part of the Big Ideas series, supported by the John Templeton Foundation. Participants: Micheal Levi Moderator: Brian Greene WSF Landing Page: worldsciencefestival.com/programs/is-dark-energy-decaying - SUBSCRIBE to our YouTube Channel and "ring the bell" for all the latest videos from WSF - VISIT our Website: worldsciencefestival.com - LIKE us on Facebook: facebook.com/worldsciencefestival - FOLLOW us on Twitter: twitter.com/WorldSciFest #worldsciencefestival #Darkenergy #desi #briangreene #physics