Time since the birth of Newton

Time since the birth of Newton (381 y)

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Neat Ratios ...

Time since the birth of Newton (381 y)

is 1/40 of Time since first humans in Americas (15,000 y)...more
is 1/5 of Time since the peak of Roman Empire (1,900 y)...more
is 1/2 of Time since the birth of Marco Polo (770 y)...more
is 1/2 of Time since the birth of Dante Alighieri (759 y)...more
is 2 x Lifespan of Galapagos giant tortoise (190 y)...more
is 4 x Time since Charles Lindbergh first flew across the Atlantic (97 y)...more
is 5 x Time since the invention of the transistor (76 y)...more
is 5 x Period of Halley's Comet's orbit (75.3 y)...more
is 25 x Time since first iPhone launched (15 y)...more
is 25 x Lifespan of a cat (15 y)...more
is 200 x Period of Mars's orbit (1.88 y)...more

If this was a standard unit ...