Nir Shaviv, professor at the HUJI (click!) and a leading expert in cosmoclimatology, replies to a criticism by RealClimate.ORG.
Get ready for a discussion about the Milky Way and its spiral arms. For example, if you really want to believe that climate change is man-made and dangerous, you should also join RealClimate.ORG in believing that our Galaxy with four major spiral arms has two spiral arms only, a new "consensus science" supported by a "majority of scientists in the world". ;-)