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Time since the extinction of dinosaurs

Time since the extinction of dinosaurs (66 million y)

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Neat Ratios ...

Time since the extinction of dinosaurs (66 million y)

  • is about as big as Time since the end of the Cretaceous geologic period (66 million y)...more
  • is 25 x Age of earliest stone hand axe (2.6 million y)...more
  • is 10000 x Age of the earliest city (6,500 y)...more

If this was a standard unit ...