Elon Musk, the billionaire co-founder of PayPal and the one in charge of creating SpaceX, wants a colony on Mars for 80,000 people. Only one problem, they must all be vegetarians.
Presumably it would be easier to set up a colony of vegetarians on Mars, as then it would only be necessary to grow vegetables in some form; whatever the case, this is what Musk is insisting and planning on.
Read more: Billionaire entrepreneur wants vegetarian-only colony on Mars (Digital Journal)
The article goes on to say that he actually probably means vegan rather than vegetarian.