Before, prior to. There is no difference between these two except length and a certain affectedness on the part of 'prior to.' To paraphrase Bernstein, if you would use 'posterior to' instead of 'after,' then by all means use 'prior to' instead of 'before.

Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness.

I wish I could adjust my voice, but it's just what's happened to me. It's because I've lived abroad for a long time, and my wife is English and my kids all have English accents, and every voice I hear is English. I've never intentionally changed my accent at all.

You don't need a science degree to understand about science. You just need to think about it.

It is unthinkable to have a British countryside that doesn't have actual functioning farmers riding tractors, cows in fields, things like that.

Hunters will tell you that a moose is a wily and ferocious forest creature. Nonsense. A moose is a cow drawn by a three-year-old.

I can't think of anything that excites a greater sense of childlike wonder than to be in a country where you are ignorant of almost everything.