The Koch-brothers-funded Physicist Richard Muller, who has long been a climate change skeptic, just publicized the results of the most scientifically rigorous study of all temperature data available for the past 100 years or so, and well, the skeptics have less reason to be skeptical now.

But Muller’s congressional testimony last March didn’t go according to plan. He told them a preliminary analysis suggested that the three main climate models in use today—each of which uses a different estimating technique, and each of which has potential flaws—are all pretty accurate: Global temperatures have gone up considerably over the past century, and the increase has accelerated over the past few decades.