• Question: How old is the planet Earth?

    Asked by danandcallum123 to Ed, Hayley, Jason, Nathan, Sophie on 13 Mar 2013.
    • Photo: Hayley Evers-King

      Hayley Evers-King answered on 13 Mar 2013:

      The Earth is about 4 and a half billion years old. This was estimated through radiometric dating (looking at how long it takes chemicals in rocks to change) and by comparison to other estimates of the age of the sun and our solar system.

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