November 28, 2012
Elon Musk has always been a big-idea man. The guy co-founded Tesla Motors and Paypal and is worth more than $2.4 billion. Oh, did we mention he builds spaceships, too? Musk is the founder and CEO of SpaceX, a private space transport company that builds rockets and spacecrafts used by NASA. So it should be no surprise that his next venture is similarly out-of-this-world. Musk is planning to build a giant colony on Mars inside an enormous, pressurized bubble. The ambitious billionaire has already mapped out the beginning phases of his Red Planet city, and one thing is for sure: it’s going to cost him. Read more!