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Which celebrity is hiding behind this number?

Roger DitterJuly 6, 2016

Mark Zuckerberg is behind this number. Facebook, which was launched by the US-American in 2004, has approximately 1.65 billion users, making it the world's largest social network.

Image: picture-alliance/dpa/K.Nietfeld

He recently pledged to donate 99 percent of his Facebook shares "to the cause of human advancement."