1. Blue color - Zuckerberg is colorblind

The founder of the social network can not distinguish red from green. Therefore his posibility to discern different shades of blue led him to choose the main color for his creation.

2. Search even backwards

Facebook users can use the search in more than 70 languages​​, and are allowed to even type in the "reverse" English.

3. Obama "has made​​" Zuckerberg to wear a suit

It is well known that the founder of Facebook wears jeans and a sweatshirt with a hood, but during the meeting with the President of the United States he wore a suit. Obama then joked that he was able to get him to wear a suit.

4. Yahoo wanted to buy Facebook for a billion dollars

In July 2006th The Yahoo offered Zuckerberg billion dollars, which he refused because "he did not know what to do with all that money." Present value of Facebook is 153 billion dollars.

5. 4,000 photos are posted every second

Users are posting more than 350 million images every day, and according to a survey in September it is estimated that more than 250 billion photos is posted on Facebook so far.

6. Icelanders wanted to write a Constitution via Facebook

Citizens of Iceland wrote the Constitution via Facebook. This is a unique case in the world, due to the crisis that has erupted in the country five years ago. The document was discontinued in mid-last year.

7. Three-quarters of British users have "drunk" images

Research conducted by YouGov has shown that as many as 75 percent of Facebook users in the UK has photos that show they were drunk.

8. Zuckerberg "does not like" Twitter

Although a member of this network, with a profile that's being followed by nearly 300 thousand users, he wrote only 19 tweets in five years.

9. Facebook hires "security bug hunters"

Like most other companies, Facebook rewards developers who find errors in security on their network. The minimum award is $500, and the largest payout so far was 33,500 dollars.

10. One-third of divorces because of Facebook

Three years ago, a third of couples in the UK has mentioned this social network as a reason for divorce (posts and comments that they saw on it). At the same time, the number of messages sent last year amounted to eight billion.