I think it's inevitable that there will be Earthlings establishing a presence on Mars. And I would say that it would certainly take place by 2050 or shortly thereafter.

Nobody ever asks who was the seventh person on the Moon. The only thing they know is who's number one and who's number two. Does anybody know who the last man was?

Everyone should take their hats off to Neil Armstrong. He is a humble guy who doesn't wave his own flag.

You can never tell when a commercial space venture will suddenly become viable.

We're number one on the runway.

Certainly, I've never wanted to live on past achievements.

Only a large-volume market like space travel can attack the barrier of high costs.