After falling woefully out of fashion, Yahoo wants to be cool again while catering to the capitalistic demands of its shareholders. That goal led CEO Marissa Mayer to make a $1.1 billion bet on online blogging forum Tumblr in a risky acquisition that revolves around the vision and instincts of a 26-year-old entrepreneur who dropped out of high school to pursue his dream of bringing more beauty and creativity to the Internet. Read More