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Facebook’s 4.7 degrees of separation
A major social networking study suggests it's a smaller world after all — and more in our collection of surprising facts and figures
Mark Zuckerberg, Facebook Mike Kepka/San Francisco Chronicle/Corbis

6
Number of degrees by which everyone in the world was thought to be separated, according to a famous 1967 study; hence the phrase, "six degrees of separation"

4.7
Number of degrees by which everyone in the world is actually separated, according to a new study of 721 million active Facebook users

 Sources: GigaOM, NY Times 

 

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