A
astrophoto
Guest
Trying to drum up any kind of economical evidence for a presence on the Moon...<br /><br />Are there any chemicals or elements on the Moon that might prove useful to Earth civilization that do not occur naturally or as frequently on Earth? Reading an article on building Lunar roads they mentioned elemental Iron that does not exist on Earth due to interaction with water. Are there other such things and would any of them be worth shipping back to Earth at a later date when shipping between us is far cheaper -- say a hundred years from now?