4000 Bc Shopping
4th
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4th Millennium Bc
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Information About

4000 Bc




  m 4th millennium BC
  ma 3rd millennium BC



EVENTS



CULTURES



Environmental changes


Based on studies by Glaciologist Lonnie Thompson (professor at Ohio State University and researcher with the Byrd Polar Research Center ) {Link without Title} a number of indicators shows there were a global change in climate 5,200 years ago:


SIGNIFICANT PERSONS




INVENTIONS, DISCOVERIES, INTRODUCTIONS




CENTURIES




EXTERNAL REFERENCES