Professor Moriarty enthuses over a recently published paper. Our thanks to the authors, especially Sebastian Loth, for permission to reproduce their images. Enthusiastic explanation by Professor Philip Moriarty from the University of Nottingham. 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 Sixty Symbols videos by Brady Haran Brady's other channels include: null (Chemistry stuff) null (Numbers and maths) null (Space stuff) null (Science and behind the scenes) null (Food science) null (Big science facilities) null (Favourite scientists) null (Academic look at the Bible) null (Modern language and culture)