Brin might have the best job at Google: turning science fiction into reality. The search giant’s co-founder stepped down as president of technology in 2011 to focus on the fun stuff dreamed up in the super-secretive Google X labs. Take “Project Glass,” which he unveiled in June. The goofy-looking computerized glasses let users watch videos and browse the web via a tiny display in their line of vision. In his spare time, Brin (along with his wife, 23andme CEO Anne Wojcicki) has become a bigtime philanthropist, donating $132 million to the battle against Parkinson’s disease. Cash pile: Brin’s net worth is estimated at $20.3 billion. — M.L.