This is incredibly cool, and incredibly useful! 16-year old Nicholas Rubin has written a browser extension called Greenhouse that allows you to hover over any politician’s name on any web page and instantly see what industries contributed to their campaigns, in what amount.

You can follow all sorts of celebrities on Facebook, and, of course, your friends. Even companies and other organizations. But here are seven individuals that you can follow on Facebook that it may never have occurred to you to follow, or that they would even be on Facebook.