'ManBearPig is real!' declare top climate scientists. 'And to prove it here's a photo-shopped image we found on the internet of a polar bear on a melting ice floe.'

Did you ever see a more moving picture? (Well, apart from all the other moving pictures involving polar bears). What particularly moves me is how wafer thin that ice is and how oh-so-far it is from land. Weep, oh readers, weep for the terrible plight of poor Ursus maritimus, the bear we all helped kill because of our selfish refusal to change our lifestyles! (Hat tip: Philippe Monthoux)

Well, anyway that's what 255 members of America's National Academy of Sciences want you to believe. The...