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Physics 18 Online
OpenStudy (anonymous):

According to the Big Bang theory, about how long ago did the Big Bang occur?

OpenStudy (anonymous):

around 13.7 billion years ago

OpenStudy (anonymous):

http://www.youtube.com/watch?v=P-jQUHUF1MU&NR=1&feature=endscreen this is an awesum video dont know whether answers ur q but inspires every1 abt big bang theorey's greatness!

OpenStudy (apoorvk):

yeah about 13.7 (or about 14 billion) billion years ago. in case you have watched the sitcom Big Bang Theory, the opening song starts something like "About 14 billion years ago...." that should help you remember. :))

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