Tomas Lindahl speaks at the Francis Crick Institute Clare Hall Laboratory after winning the Nobel Prize for Chemistry, just north of London, Britain, October 7, 2015. Tomas Lindahl, Paul Modrich and Aziz Sancar won the prize for “mechanistic studies of DNA repair.” Their work mapped how cells repair deoxyribonucleic acid (DNA) to prevent damaging errors from appearing in genetic information. REUTERS/Stefan Wermuth – RTS3EUE