When Gaurav Khanna was studying black holes, his laboratory needed an expensive supercomputer. Gaurav had another idea: he bought 412 pretty cheap PlayStation 3 consoles and installed another operating system on them. It turned out to be much more powerful and efficient than its expensive fellow.
7. The Million Dollar Homepage
In 2005, an English student named Alex Tew decided to earn money for his education. He launched a website, each pixel of which cost $1. Anyone could buy a section of the site and post a link to their Web page. In less than 6 months Alex earned more than $1 million.