Using complex algorithms that we borrowed from NASA scientists and Neil Degrasse Tyson, we've determined 10 of the most popular Facebook photos, new and old. So what makes these photos so incredibly popular on Facebook exactly? That's an internet secret only Al Gore knows the answer to. One thing is certain, sharing is the new "forward" button, but somehow it manages to be less annoying. Maybe that's because your parents still aren't sure how to do it, but that day is coming.
Also check out The 20 Awesomest Facebook Timeline Covers.