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  1. Oct 2016
  2. school.bighistoryproject.com school.bighistoryproject.com
    Origin Story: Modern Scientific -- Big History Project Course
    1
    1. raycla22 03 Oct 2016
      in Public
      One electron could stay in orbit around one proton to become an atom of hydrogen
      what the first thing was on earth
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    • raycla22

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