Space only becomes ordinary when the frontier is no longer being breached.

The caricature of science is that we hold tight to the theories we have, and shun challenges to them. That's just not true. In fact, we hold our highest rewards for those scientists who can prove others wrong. And by the way, they are famous in their own lifetimes. We don't wait until they're dead.

When I wrestled, I would set aside the time to wrestle, so that in my mind it didn't interfere with my study time. If I'd say, "I'm going to study this many hours, then I'm going to go work out and wrestle," then when that time comes, you don't feel like you should be doing something else. That helped me psychologically. But otherwise? When I'm wrestling, I'm not studying the universe. And when I'm studying the universe, I'm not wrestling.

There is no greater education than one that is self-driven.

Not only do we live among the stars, the stars live within us.

Now imagine a world in which everyone, but especially people with power and influence, holds an expanded view of our place in the cosmos. With that perspective, our problems would shrink-or never arise at all-and we could celebrate our earthly differences while shunning the behavior of our predecessors who slaughtered each other because of them.

To achieve this density of a neutron star at home, just cram a herd of 50 million elephants into the volume of a thimble.