4.7 Degrees of Separation: Who Do You Know?

The 7 billion people on earth are more connected than previously believed.
1:51 | 11/23/11

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Transcript for 4.7 Degrees of Separation: Who Do You Know?
We learned today that the seven billion of us on this planet are a lot more closely related than you might think. ABC's John Berman crunch the numbers and found some pretty -- connections. Justin Bieber and Chinese leader Hu Jintao. Might as well be best friend's house -- Baby baby fever is dating Selena Gomez used to -- -- Jonas of Jonas Brothers late for Malia Obama are eight a Leah knows -- Obviously who's been known to hang with -- from time to time. For years we called this phenomenon six degrees of separation. The notion network all connected to each other through no more than six jobs there's also the pop culture version six -- Actor could be connected to every other group Kevin Bacon. The science came from a 1967. Study where researchers asked volunteers to try to send a postcard to a person they didn't know. He took jumps recording -- fine man. But that was back when there were post -- six degrees is getting a make over all -- to social media. A new study finds it on these look we're getting closer connected by an average of four point 74. Grant and what does that mean for society. Kevin Bacon was not available for comment we actually try -- in a move that will connect speaking to another -- related celebrity. Miss -- is in the -- -- with Amy Adams who was in Julie Julie with Meryl Streep who starred with a big hit in the river why. -- -- -- Next here Justin Bieber Hu Jintao Kevin -- Nick Jonas -- his peak he should -- -- Kansas City. Or -- he could -- John Berman ABC news New York.

This transcript has been automatically generated and may not be 100% accurate.

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