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

It's not going to do any good to land on Mars if we're stupid.

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

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

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

We want to make sure we get living astronauts to the surface of Mars.

It's great that people are interested in Mars.

I am confident that life once thrived on Mars and may well still exist there today.

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.

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.