Time since the birth of Pierre de Fermat

Time since the birth of Pierre de Fermat (421 y)

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Neat Ratios ...

Time since the birth of Pierre de Fermat (421 y)

is 1/100 of Age of oldest musical instrument (42,000 y)...more
is 1/25 of Time since first domestication of cattle (10,500 y)...more
is 1/25 of Time since first domestication of cats (10,500 y)...more
is 1/5 of Time since the birth of Julius Caesar (2,120 y)...more
is 1/5 of Time since the birth of Cleopatra (2,090 y)...more
is 1/4 of Time since the birth of mathematician Hypatia (1,672 y)...more
is 1/2 of Time since the birth of Fibonacci (852 y)...more
is about as big as Time since Shakespeare's play Hamlet was written (423 y)...more
is 2 x Time since the birth of Darwin (213 y)...more
is 2 x Time since the birth of Dickens (210 y)...more
is 2 x Time since the birth of Ada Lovelace (207 y)...more
is 5 x Time since the first Volkswagen Beetle produced (84 y)...more
is 5 x Period of Uranus's orbit (84 y)...more

If this was a standard unit ...