A look at Elon Musk and his 18 ventures

Billionaire entrepreneur Elon Musk has launched rockets, spaceships and electric cars, and after his stint on CBS’s " The Big Bang Theory" last night, he can add TV sitcom to his epic list of achievements. He may be worth $13.1 billion (Sept 2015) but the tech entrepreneur says "there’s no such thing as a business, just pursuit of a goal". However, the 44-year-old sure has involved himself in a bunch of them. Here’s a look at 18 venture that Musk has taken interest in..