https://www.americanthinker.com/blog/2019/08/michael_mann_c
Michael Mann, a climatologist at Penn State University, is the creator of the “hockey stick graph” that appears to show global temperatures taking a noticeable swing upward in the era when humanity has been burning fossil fuels and dumping CO2 into the atmosphere. The graph was first published in 1998, prominently featured in the 2001 UN Climate Report, and formed part of Al Gore’s 2006 movie, An Inconvenient Truth.
The graph’s methodology and accuracy have been and continue to be hotly contested, but Mann has taken the tack of suing two of his most prominent critics for defamation or libel. One case, against Mark Steyn, is called by Steyn likely to end up in the Supreme Court. But another case, against Dr. Tim Ball was decided by the Supreme Court of British Columbia, with Mann’s case thrown out, and him ordered to pay the defendant’s legal costs, no doubt a tidy sum of money. News first broke in Wattsupwiththat, via an email Ball sent to Anthony Watt. Later, Principia-Scientific offered extensive details, including much background on the hockey stick.