1. Al Pacino was in the original logo

Facebook’s first logo had a sketch with the face of the young actor Al Pacino. It was designed by the co-founder of the social network Andrew McCollum who was also a member of Facebook’s original team.

5 Things You Didn't Know About Facebook

 

2. Mobile usage growth

79% of all people are using Facebook from a mobile device and there are averagely 486,183 users a minute accessing Facebook from their phone.

3. The ‘Awesome’ button

Facebook’s famous ‘Like’ button was initially known as the ‘Awesome’ button, but they ended up going with ‘like’ because it is more common and internationally recognizable word.

5 Things You Didn't Know About Facebook

4. Shortcut to the Facebook founder

If you put /4 after Facebook’s main URL you’ll be automatically directed to  Mark Zuckerberg’s profile. His Facebook ID is 4, because it’s believed that the first three accounts were created for testing purposes and the fourth was Zuckerberg’s real account.

5. The ‘degree of separation’ on Facebook is 3.57

The average degree of separation, which refers to the people it takes to connect you to another person, on Facebook is 3.57. The calculation is based on the 1.6 billion users of the social network and reveals how the internet is making the world more connected than ever.