Even the professional understanding of quantum mechanics is "embarrassing", says cosmologist Sean Carroll. Read Sean's blog on this subject at http://bit.ly/V1SUpV and the full paper at http://arxiv.org/abs/1301.1069 We filmed with Sean during his visit to the University of Nottingham and will have more videos with him coming soon. Check out Sean's website (and his excellent books) at: http://preposterousuniverse.com/ Read his Higgs Boson book: http://amzn.to/Nvdn8P Visit the SIxty Symbols website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://www.nottingham.ac.uk/physics/index.aspx Sixty Symbols videos by Brady Haran A run-down of Brady's channels: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html