Facebook was launched on February 4th by Mark Zuckerberg as TheFacebook.com. At that time he was studying psychology at Harvard and had not yet an idea of what he just created. Just 24 hours later already 1200 Harvard students signed up and after a month half of the undergraduate students at Harvard followed them. Now in 2017 Facebook has 1,9 billion users at it keeps growing bigger and bigger. Every five second five new profiles are being created, which means 18,000 new users per hour!