For me it's been very exciting to contribute to the public's understanding of how rich and wondrous science is.

When I give this talk to a physics audience, I remove the quotes from my 'Theorem'.

...quantum mechanics—the physics of our world—requires that you hold such pedestrian complaints in abeyance.

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.

How can a speck of a universe be physically identical to the great expanse we view in the heavens above?

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

I was holding [my four-year-old daughter] and I said, 'Sophia, I love you more than anything in the universe.' And she turned to me and said, 'Daddy, universe or multiverse?'