According to inflation, the more than 100 billion galaxies, sparkling throughout space like heavenly diamonds, are nothing but quantum mechanics writ large across the sky. To me, this realization is one of the greatest wonders of the modern scientific age.

My best teachers were not the ones who knew all the answers, but those who were deeply excited by questions they couldn't answer.

Experimental evidence is the final arbiter of right and wrong.

Black holes, we all know, are these regions where if an object falls in, it can't get out, but the puzzle that many struggled with over the decades is, what happens to the information that an object contains when it falls into a black hole. Is it simply lost?

We are living through a remarkably privileged era when certain deep truths about the cosmos are still within reach of the human spirit of exploration.

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

When you buy a jacket, you pick the size to ensure it fits. Similarly, we live in a universe in which the amount of dark energy fits our biological make-up. If the amount of dark energy were substantially different from what we've measured, the environmental conditions would be inhospitable to our form of life.