Time since the end of the Cambrian geologic period

Time since the end of the Cambrian geologic period (485 million y)

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Time since the end of the Cambrian geologic period (485 million y)

is about as big as Time since the emergence of earliest insects (480 million y)...more
is 100 x Age of earliest mammoth fossils (4.8 million y)...more

If this was a standard unit ...