The lecture is in pure astrophysicist-ese. I intercept bits of English: cosmic rays, warming earth, getting worse, very bad. Then Casper Ammann, a paleoclimatologist at the National Center for Atmosphere Research in Boulder, Colorado, throws up a new slide. This one makes sense. It shows an easy-to-understand bar graph that illustrates the negligible effects of solar radiation on climate change compared with the effects of human-driven greenhouse gases, which appear on Ammann's graph as a green line that dramatically spikes upward beginning in the 1960s. This comparative data is significant because the intensity of cosmic irradiation is approaching an all-time historic high, and scientists are eager to know what it means for our already toasty planet. Some have even proposed launching mirrors into space to reflect sunrays.