Astronomer Dr Becky Smethurst is our new "Sixty Symbols Ogden Fellow". Leave a comment on any topics you'd like her to cover in future videos. Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Dr Smethurst's fellowship is also supported by The Ogden Trust. Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Patreon: https://www.patreon.com/sixtysymbols Email list: http://eepurl.com/YdjL9