Mark Zuckerberg (1984) is an American computer scientist, creator of the social networking site Facebook. He studied at Harvard University, and is also an important philanthropist. He was named Time Magazine's Person of the Year in 2010:
Person of the Year 2010: Mark Zuckerberg. For connecting more than half a billion people and mapping the social relations among them; for creating a new system of exchanging information; and for changing how we all live our lives, Mark Elliot Zuckerberg is TIME's 2010 Person of the Year. 
Facebook is based in Palo Alto, California. The name of the site is based on the paper facebooks that many colleges give to incoming students, faculty, and staff depicting members of the campus community. 
Zuckerberg has announced he plans to leave Facebook in 2017, largely because he became disgusted with how social media has been used by people to attack each other.
Mark's Visit to Newark, NJ.