Six years ago, climatologist Dr. Tim Ball challenged the data and scientific methodology of Michael E. Mann’s (in)famous “hockey-stick” temperature graph. As did several other climate observers.
But for his harshest critics, Mann took the unusual step of suing them for libel.
Ball, a Canadian citizen, wrote an op-ed in which he wrote that Mann “belongs in the state pen, not Penn State.” The suit alleged that Ball’s statements were factually untrue and defamatory.
In the op-ed, Ball was referring to Mann’s hockey-stick graph, which eliminated the widely accepted Medieval Warm Period (MWP) of 950-1250 A.D. and introduced a pronounced uptick in temperatures in the late 20th century.