Every moment is as real as every other. Every 'now,' when you say, 'This is the real moment,' is as real as every other 'now' - and therefore all the moments are just out there. Just as every location in space is out there, I think every moment in time is out there, too.

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

Exploring the unknown requires tolerating uncertainty.

I've seen children's eyes light up when I tell them about black holes and the Big Bang.

Time allows change to take place and the very evolution of the universe is what requires some conception of time. Mathematically can we write down a universe that doesn't have time? Sure. Do we think that would be realised in the larger reality that is out there? None of us take that possibility seriously.

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

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.