4.54 billion years +/- 1%

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送交者: james_hussein_bond 于 2008-05-07, 09:52:19:

回答: the earth was formed about 4.6 billion years ago? 由 yell 于 2008-05-07, 09:43:35:

http://pubs.usgs.gov/gip/geotime/age.html


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