The second difficulty with black holes in equilibrium with thermal radiation is that black holes have negative specific heat. In many cases, when they absorb energy, they get larger and colder. This reduces the radiation they give off, and so they absorb faster than they radiate, and the...
Just to break the monotony, he told me this in a pm as soon as this post went up
"I haven't even begun to capture the video. Just sat down at my computer after driving 40 mins to get home."