Time since the end of the Triassic geologic period, mass extinction

Time since the end of the Triassic geologic period, mass extinction (201 million y)

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Neat Ratios ...

Time since the end of the Triassic geologic period, mass extinction (201 million y)

  • is 4000 x Time since first humans in Australia (50,000 y)...more

If this was a standard unit ...

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