It occurred to me I haven't bothered you with my random thoughts for a while, so here's a topic that keeps coming back to me: The consistency of laws. In mathematics it's the whole point, in physics it's a guiding principle, but when it comes to our...

The other day we were discussing how unfortunate it is that the "quantum gravity" group at Perimeter Institute is called quantum gravity, even though it excludes string theory, which is another group. However, I couldn't really come up with a better...

I recently learned there's no W in the Swedish language. How eird is that? More generally, living in a country where I don't understand the language has taught me how tiny the actual information content of spoken language is. Like, there's the woman...

A week ago, I explained the idea of causal diagrams, or Penrose-Carter diagrams, and we discussed the diagram for the static black hole metric shown below. As I pointed out, though a solution of Einstein's field equations, this diagram does not...

I'm presently in Germany, about to give yet another talk. Yesterday, I had the great idea to get a flu shot with the result that today I feel pretty shitty, like, as if I'm getting the flu. Best conditions to give a seminar. On the upside, I finally...