Beck Diefenbach/Reuters
- Mark Zuckerberg's 40th birthday bash featured recreations of his old bedrooms.
- Bill Gates, in a black hoodie, hung out in a replica of Zuckerberg's Harvard dorm room.
- Gates and Zuckerberg both dropped out of Harvard to pursue their own ventures.
Mark Zuckerberg's 40th birthday bash gave us a glimpse of an alternate universe where Zuck and Bill Gates are college roommates.
Zuckerberg showcased the party in a Tuesday Instagram post. The slideshow shows him in mini-replicas of some of his former cribs — including the Harvard dorm room where he launched Facebook.