If the theory turns out to be right, that will be tremendously thick and tasty icing on the cake.

I believe we owe our young an education that captures the exhilarating drama of science.

We might be the holographic image of a two-dimensional structure.

There's a picture of my dorm room in the college yearbook as the most messy, most disgusting room on the Harvard campus, where I was an undergraduate.

Physics grapples with the largest questions the universe presents. Where did the totality of reality come from? Did time have a beginning?

So: if you buy the notion that reality consists of the things in your freeze-frame mental image right now, and if you agree that your now is no more valid than the now of someone located far away in space who can move freely, then reality encompasses all of the events in spacetime.

A watch worn by a particle of light would not tick at all. Light realizes the dreams of Ponce de Leon and the cosmetics industry: it doesn't age.