First, congrats to astrophysicist (and sometimes guitarist) Brian May for publishing his thesis. That's cool. Second, I can't do the live video chat today. Too many things to do at that time, for one. For another, the AC is on the fritz, and it's 100 F outside, meaning it's like 85 in my office. That makes me grumpy and sweaty and my forehead will probably shine so strongly it'll glare in the camera. Next week is the Galapagos cruise which will overlap two Sundays, so the video chat is on hiatus for a short time. I suspect I can do it again on August 24 -- which is the anniversary of the launch of Hubble, so that's appropriate.