CNN — Happy birthday, Facebook!
The social network co-founded by Mark Zuckerberg in a Harvard dorm room turned 10 Tuesday.
Now, Facebook has 1.2 billion users. Just think about how the site has given new meaning to words we always used: unfriend, tag and poke, to name a few.
About six in 10 users log in every day to share status updates, photos and of course, "like" things.
By the way, there are six billion "likes" per day.