In the second "extended interview" with Professor Ed Copeland, he discusses inflation, the Big Bang and when the observable Universe fit inside a grapefruit. Part One (cosmic strings): https://www.youtube.com/watch?v=03vIkZR2hNY Part Three (Big Rip): https://www.youtube.com/watch?v=IJYDcXZMe9c About text on screen: http://periodicvideos.blogspot.co.uk/2013/12/text.html Visit our 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