The mysterious world of quantum mechanics has mystified scientists for decades. But this mind-bending theory is the best explanation of reality that we have. Sean’s book "Something Deeply Hidden" is available now - https://geni.us/jrBLV Watch the Q&A: https://www.youtube.com/watch?v=Jv5FYrOthvE Whether it’s Schrödinger's cat or the many worlds interpretation, the ideas quantum mechanics throws up about the reality we live in can seem incredibly strange and daunting. In this talk, Sean walks you through the history of quantum discoveries, from Einstein and Bohr to the present day, guiding you through the most intriguing subject in science and explaining his own favourite theories along the way. Sean M Carroll is a theoretical physicist, specialising in quantum mechanics, gravitation, cosmology, statistical mechanics, and foundations of physics, with occasional dabblings elsewhere. His official titles are Research Professor of Physics at Caltech and Research Professor at the Santa Fe Institute. He lives in Los Angeles with his wife, writer Jennifer Ouellette. This talk was filmed in the Ri on 22 January 2020. --- A very special thank you to our Patreon supporters who help make these videos happen, especially: Alan Latteri, Andrew McGhee, Anonymous, Dave Ostler, David Crowner, David Lindo, David Schick, Greg Nagel, Jan Bannister, Joe Godenzi, John C. Vesey, Kellas Lowery, L S, Lasse T. Stendan, Matt Townsend, Osian Gwyn Williams, Paul Brown, Rebecca Pan, Robert Hillier, Robert Reinecke, and Roger Baker. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for regular science videos: http://bit.ly/RiSubscRibe Product links on this page are affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.