We're quite happy with our Big Bang description of cosmic origins. But actually, the Big Bang accounts for what happened only after the beginning. The beginning itself, and especially what happened before, remains the biggest mystery of all.

I have thoughts every day that are themselves tweets.

Science literacy is a vaccine against the charlatans of the world that would exploit your ignorance.

Also, where does your identity come from? Your memory, of course.

When NASA dreams big America dreams big. People...kids say, 'I want to do that when I grow up'. Because you want to do what's visible to you.

I'd like to live in a world where people embrace objective truths rather than be offended by them.

For decades, we've been trying to cook up the building blocks of life, in the lab, and recreate the origins of it all, but the parts didn't seem to fit together, until now.