Mars is there, waiting to be reached.

Going to Mars would evolve humankind into a two-planet species.

I'm sure that there are places in the deserts in Australia that could be similar to where we might want to go on Mars.

I think there would be no shortage of applicants to the government astronaut corps to be settlers on the planet Mars. And I think this would be very inspiring.

I suggest that going to Mars means permanence on the planet - a mission by which we are building up a confidence level to become a two-planet species.

The life expectancy of people going to Mars may be decreased by the higher level of radiation that they receive.