Lawrence Solomon: How Wikipedia’s green doctor rewrote 5,428 climate articles

"The Climategate Emails describe how a small band of climatologists cooked the books to make the last century seem dangerously warm.

"The emails also describe how the band plotted to rewrite history as well as science, particularly by eliminating the Medieval Warm Period, a 400 year period that began around 1000 AD.

"The Climategate Emails reveal something else, too: the enlistment of the most widely read source of information in the world — Wikipedia — in the wholesale rewriting of this history.

"The Medieval Warm Period, which followed the meanness and cold of the Dark Ages, was a great time in human history — it allowed humans around the world to bask in a glorious warmth that vastly improved agriculture, increased life spans and otherwise bettered the human condition.

"But the Medieval Warm Period was not so great for some humans in our own time — the same small band that believes the planet has now entered an unprecedented and dangerous warm period. As we now know from the Climategate Emails, this band saw the Medieval Warm Period as an enormous obstacle in their mission of spreading the word about global warming. If temperatures were warmer 1,000 years ago than today, the Climategate Emails explain in detail, their message that we now live in the warmest of all possible times would be undermined. As put by one band member, a Briton named Folland at the Hadley Centre, a Medieval Warm Period 'dilutes the message rather significantly.'"