A lot of my role is advocacy, and as a scientist, you're an advocate, too, because you are coming up with a theory and having to convince your fellow scientists that you're right.

One of the big things about space exploration is that it is as expensive as it is complicated, and you need all the countries of the world to help if you want to accomplish big goals.

My key aim is to get man on the surface of Mars by the mid-2030s.

I grew up in this business... A lot of my life has been centered around this question about how NASA is helping us to understand our own home planet... and to understand our place in the universe.

Adventure games are all about details - if you happen to take this one object and use it with this other object, in a really weird place, at a weird time. If you happen to write a really funny dialogue line for that, even if it didn't solve the puzzle, people will appreciate that.

My life is to travel, and my life is also to speak out about the horrors of an environment that is being abused at the hands of oil companies.

People who don't travel cannot have a global view, all they see is what's in front of them. Those people cannot accept new things because all they know is where they live.

I myself was born beside a river - the Avon in Sarum. So when I first encountered New York's great harbor and the Hudson River as a teenager, and came to understand their historic canal and railroad links to the vast spaces of the Midwest, I felt both the thrill of a new adventure and a deep sense of homecoming.