There was a time in climate science when tree rings were used for good instead of evil, a time of innocent enquiry, a time that ended with the noble-cause corruption. From that time, one of the best predictions of climate ever made (weighted for distance and accuracy) was by two Californian researchers, Leona Libby and Louis Pandolfi. In 1979, they used tree ring data from redwoods in Kings Canyon to make a remarkably accurate forecast1 From a Los Angeles Times interview of that year, When she and Pandolfi project their curves into the future, they show low!r average temperatures from now through the mid-1980s.  “Then,” Dr. Libby added, “we see a warming trend (by about a quarter of 1 degree Fahrenheit) globally to around the year 2000.  And then it will get really cold—if we believe our projections.  This has to be tested.”  How cold? “Easily one or two degrees,” she replied, “and maybe even three...(Read Full Article)