Last week, 5,000 files of private email correspondence among several of the world's top climate scientists were anonymously leaked onto the Internet. Like the first climategate" leak of 2009, the latest release [includes emails from] top scientists in the field ... like Michael Mann of Penn State University and Phil Jones of the University of East Anglia. The new release of emails was timed to coincide with the second anniversary of the original climategate leak and with the upcoming United Nations climate summit in Durban, South Africa. And it has already stirred strong emotions. But at least one scientist involved -- Mr. Mann -- has confirmed that the emails are genuine. If the case for man-made global warming is really as strong as the so-called consensus claims it is, why do the climategate emails show scientists attempting to stamp out dissenting points of view? This is the real significance of the climategate emails. They show that major scientists who inform the IPCC can't be trusted to stick to the science and avoid political activism. This, in turn, has very worrying implications for the major international policy decisions adopted on the basis of their research.