DC judge dismisses Penn State climate professor's defamation case against National Review

A Washington, D.C. judge on Friday dismissed the defamation case that Penn State professor Michael Mann filed against the conservative magazine National Review in 2012 over a blog post that called his infamous "hockey stick graph" "deceptive" and "fraudulent."

The "hockey stick graph" was meant to illustrate a sharp rise in global temperatures corresponding approximately with the Industrial Revolution, when humans began emitting large amounts of greenhouse gases into the atmosphere. It showed temperatures increasing sharply after a long time remaining relatively flat, forming the shape of a hockey stick. But many questioned the methods Mann used to create the graph.  A docket entry for Friday on the D.C. Superior Court's case page says that the judge granted "National Review's Motion for Summary Judgment."