Before we start talking about genetic differences, you gotta come up with a system where there's equal opportunity.

The telescope... is a conduit to the cosmos.

On Venus you could cook a 16-inch pepperoni pizza in seven seconds, just by holding it out to the air. (Yes, I did the math.)

Not everyone is going to like science as a subject.

Science reveals that all life on Earth is one.

Those who see the cosmic perspective as a depressing outlook, they really need to reassess how they think about the world. Because when I look up in the universe, I know I'm small but I'm also big. I'm big because I'm connected to the universe and the universe is connected to me.

Let us not fool ourselves into thinking we went to the Moon because we are pioneers, or discoverers, or adventurers. We went to the Moon because it was the militaristically expedient thing to do.