Whatever I was going into, whether it was going to be chorus or history or astronomy or whatever, do it right. Be a professional. Don't just do a half baked job. Do everything correctly. Get down. Learn the details of what you're going to do.

What we're learning is that the sun and its warmth isn't the only way to get warmth in the solar system, and we've been thinking that for some time.

We need people pushing the boundaries. Exploration is what we, as humans, do.

Because exploration is not science driven, you've got to ask what is it driven by? And it's driven by politics.

For scientists, growing cells took so much work that they couldn't get much research done. So the selling of cells was really just for the sake of science, and there weren't a lot of profits.

Neuroscience is now a very important research area in biology. We are now understanding a lot more about brains in babies, as well as children and adults.

How many of you have broken no laws this month? That's the kind of society I want to build. I want a guarantee - with physics and mathematics, not with laws - that we can give ourselves real privacy of personal communications.

I always say to my students that being a scientist is like being an explorer, and I really mean that because, in a sense, I think in science we explore the world, the universe around us.