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When we get there, if we don't find any life on Mars, from that point on there will be life on Mars because we'll bring it there, whether it's germs and leftover urine bags, whatever it is.

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

If humanity doesn't land on Mars in my lifetime, I would be very disappointed.

I think that when humans get around to exploring and building cities and towns on Mars, it will be viewed as one of the great times of humanity, a time when people set foot on another world and had the freedom to make their own world.

Of course, it's a dream to go to Mars. I want to find out whether there was life there or not. And if there was, then why did it die out? What sort of catastrophe happened?

I think humans will reach Mars, and I would like to see it happen in my lifetime.

I hope I'm still alive to see an expedition set off for Mars.

Mars, we know, was once wet and warm. Was it home to life? And what can living and learning to work on its rust-colored surface teach us about the future of our own planet, Earth? Answering those mysteries may hold the key to our future.

I am absolutely certain that life can exist in outer space, move around, find a new aqueous environment.