I know enough about the moon to know how unpleasant and inhospitable it is. . . . I know enough about Mars to know that you can't live there, you can't settle it. Mars and the moon are two ugly… — Wally Schirra Copy Share Image
I'd love to do something like put a piece of moon rock on Mars and a piece of Mars on the moon, a sort of reverse archaeology. — Cornelia Parker Copy Share Image
