Musk Money

During his interview on "60 Minutes" last evening, Elon Musk said he has put about $100 million of his own money into SpaceX. That's a lot of money for an individual, of course, but it's not a huge sum in the corporate world, and it's a small percentage of Musk's total wealth-- he's a billionaire.

Given the success of SpaceX, so far, the financial resources involved suggests opening space to widespread human activity need not cost billions of dollars up front. That's a positive sign for a better future.