Photos: Facebook's biggest changes It has been more than 10 years of change for Facebook, the social network founded February 4, 2004, by Mark Zuckerberg, right, Dustin Moskovitz and three other classmates in a Harvard dorm room. From its awkward beginnings to an international phenomenon with 1.4 billion users, here's a look at the many faces of Facebook. Hide Caption 1 of 17

Photos: Facebook's biggest changes 2004: Facebook launches – It was first known as "Thefacebook" when it launched at Harvard University as a way for students to connect. The social-networking site spread to Columbia, Stanford and Yale universities the following month, and the Facebook Wall made its debut in September. By December, Thefacebook had nearly 1 million users. Hide Caption 2 of 17

Photos: Facebook's biggest changes 2005: Students spread the word – The site grew beyond the Ivy League to include more than 800 colleges and universities by May 2005, and its official name changed from Thefacebook to just Facebook that August. Facebook began allowing high school students to join in September. Hide Caption 3 of 17

Photos: Facebook's biggest changes 2006: Meet the News Feed – By 2006, anyone 13 and up was allowed to join Facebook. That same year Facebook introduced the News Feed, which highlighted new updates and photos within your social networks. As they would after almost every major change, Facebook users revolted, starting a petition to change Facebook back. One petitioner said, "I don't need to know everything about EVERYONE." Hide Caption 4 of 17

Photos: Facebook's biggest changes 2007: Another new design – Facebook updated its site design in April 2007, moving friends, networks and the inbox to the top of each page and photos, notes, groups and events to a bar on the left. Facebook Platform launched in May, which allowed for developers to create third-party apps. (Another backlash erupted when those apps started requesting personal information.) Later that year, Facebook introduced ads, which convinced some users the site was going the way of MySpace. Hide Caption 5 of 17

Photos: Facebook's biggest changes 2008: New profile pages – Facebook profile pages were redesigned in 2008 to add five main tabs: Feed, Wall, Info, Photos and Boxes. The new design was, as usual, met with negative comments from users resistant to change. Facebook also debuted its Chat feature that year, allowing real-time instant messaging. Hide Caption 6 of 17

Photos: Facebook's biggest changes 2009: The 'Like' button – The "Like" button was introduced on Facebook in 2009, letting users show appreciation for clever status updates or pictures of their friends' cats getting into shenanigans. Cynical users demanded a "Dislike" button. Facebook also launched Pages to let fans follow celebrities, sports teams or causes. Hide Caption 7 of 17

Photos: Facebook's biggest changes 2010: Growing privacy concerns – Facebook introduced instant personalization, which gave partner websites information about users so they could personalize your experience. Advocacy groups like the ACLU reacted negatively to the new feature, saying users should have to opt in instead of getting the setting by default. Under pressure, Zuckerberg tweaked Facebook's settings to give users greater control over privacy. Hide Caption 8 of 17

Photos: Facebook's biggest changes 2010: Facebook adds 'check-ins' – Taking a cue from apps like Foursquare (and rival Gowalla, which it eventually bought in 2011), Facebook launched Places, which allowed mobile users to check in at their locations. The most "checked-in" spot? Disneyland. Hide Caption 9 of 17

Photos: Facebook's biggest changes 2011: Photos, photos everywhere – By February 2011, Facebook had become the Web's largest host of photographs. Over its decade, users have uploaded more than 250 billion photos to the site. And by the end of the year, it began scrapping users' Walls in favor of another layout change. Fast forward to 2012 ... Hide Caption 10 of 17

Photos: Facebook's biggest changes 2011: Facebook Messenger – Mobile users who want to message friends can do so using the Messenger app, introduced in 2011. Hide Caption 11 of 17

Photos: Facebook's biggest changes 2012: Hello, Timeline – In the spring of 2012, Facebook forced all users to convert to its Timeline profile layout, which arranged updates in chronological order, searchable by year. Hide Caption 12 of 17

Photos: Facebook's biggest changes 2013: Going mobile – By late 2013, Facebook reported that 945 million of its 1.2 billion users were visiting via a smartphone or tablet. After years as a Web-first product, Facebook began putting a new emphasis on mobile tools, growth and revenue. Hide Caption 13 of 17

Photos: Facebook's biggest changes 2013: Verified accounts – Following a trend made popular by Twitter, Facebook allowed select Pages for people, sports, media and government to become verified in 2013. The badges show a page's authentic affiliation. Hide Caption 14 of 17

Photos: Facebook's biggest changes 2013: Hashtags – Hashtags were introduced to Facebook in 2013. The hashtag was created on Twitter in 2007 as a way of pulling together different posts about the same topic. Hide Caption 15 of 17

Photos: Facebook's biggest changes 2015: Embedded Facebook videos – Facebook began competing with YouTube by allowing users to upload videos directly to the social network. In 2015, they also began allowing users to easily embed Facebook videos in other platforms. Hide Caption 16 of 17