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The Martians are always coming.

The purpose of going to Mars is for humans to first begin to occupy, permanently, another planet in the solar system. The astronauts or pilgrims, whatever you might call them, are going to be very historically unique human beings.

It's great that people are interested in Mars.

If there was an observer on Mars, they would probably be amazed that we have survived this long.

The day Apollo 11 landed, I knew men would walk on Mars in my lifetime. I'm no longer nearly so sure. The last budget put forward in Canada contained not a penny for Mars.

We like to talk about pioneering Mars rather than just exploring Mars, because once we get to Mars, we will set up some sort of permanent presence.

People will visit Mars, they will settle mars, and we should because it's cool.

I would suspect strongly that over a period of time, if we put our mind to going to Mars, it will be a consortium of several countries.

We're not going to get humans to Mars until at least the mid-2030s, and the world is going to change by then.

Every day, we get a little bit closer to the kind of expertise and the kind of experience we're going to need to go there. I'd love to be the guy walking on Mars.