When George Scangos took the helm at biotech giant Biogen in 2010, he took a look around the company's headquarters in the Weston, Massachusetts, suburb of Boston and thought, "What are we doing out here?"
Last year, the company celebrated the return of its headquarters to Cambridge's Kendall Square, one of the capital cities of the biotechnology industry. The neighborhood's 2.5 square miles are home to 130 life sciences companies, according to industry group Massachusetts Biotechnology Council, the densest concentration on the planet.