A central issue in the suit was the veracity of the so-called “hockey stick” climate graph published by Mann and several colleagues in the prestigious scientific journal Nature in 1998.

This Scientist Fought His Attackers in Court—and Won Michael Mann, the climatologist behind the infamous ‘hockey-stick graph,’ prevailed in a defamation case and says science is on a roll ...

In 1999, Mann published the famed “Hockey Stick graph” of the world climate system. The name conveys a long, largely stable climate since the year 1000 — with a sharp upward sweep of ...