Dr Michael Mann (177)
American climatologist\xa0 Michael Mann drew a chart\xa0 back in 1999 .\xa0 \xa0It's called "The Hockey Stick Graph" because of the way it shoots up.\xa0 There was no new information in it and it drew on agreed international temperature data.\xa0
Like Charles Darwin, Dr Mann dared to publish. His "hockey stick" still makes him a target for fossil fuel lobbyists.\xa0 So what happens when a scientist is taken on by powerful interests ?\xa0 Dr Karl asks him about the experience.