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Climategate has slowly but steadily bubbled up from fringe meme on the Internet to hot-button political and scientific cause. Do a set of emails from a hacked climate research server show that global warming is a hoax, or at least an overstatement?

On This Week With George Stephanopoulos, Paul Krugman contended that there was "not a single smoking gun" to Climategate, and that the global warming skeptics using the hacked emails as evidence for their cause need to brush up on their science. (more...)