Some of the most fun people I know are scientists.

Some people say they feel very small when they think about space. I felt more expansive, very connected to the universe.

You have to actually be weighted to something to do the moonwalk, you know.

I want to make sure that that future that we're creating is one that is the best it can be for people around the world, and also one that includes the full range of our talent and our skills - and, you know, gender and ethnicity, geography - to solving the world's problems.

There is a fascination with the idea that one has 'seen someone else do something' before one can achieve it. Maybe that's true in some cases, but clearly it is not a requirement. I knew what I wanted to do.

The reality is that we know that this universe, that our galaxy, has billions of stars. We know that stars have planets. So the likelihood that there is life somewhere else to me is just absolutely there.