Time since the birth of Dante Alighieri

Time since the birth of Dante Alighieri (754 y)

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Time since the birth of Dante Alighieri (754 y)

is 1/40 of Time since first humans in Europe (30,000 y)...more
is 1/40 of Time since extinction of Neanderthals (30,000 y)...more
is 1/40 of Age of earliest sewing needle (30,000 y)...more
is 1/40 of Time since the earliest bread baking (30,000 y)...more
is 1/20 of Time since first humans in Americas (15,000 y)...more
is 1/5 of Age of earliest swords (3,700 y)...more
is 2/5 of Time since the peak of Roman Empire (1,900 y)...more
is about as big as Time since the birth of Marco Polo (765 y)...more
is 2 x Time since the birth of Newton (376 y)...more
is 4 x Lifespan of Galapagos giant tortoise (190 y)...more
is 5 x Time since the publication of Volume 1 of Marx's Das Kapital (152 y)...more
is 5 x Time since the birth of physicist Marie Curie (152 y)...more
is 10 x Period of Halley's Comet's orbit (75.3 y)...more
is 10 x Time since introduction of the first mass-produced helicopter (Sikorsky R-4) (75 y)...more
is 20 x Time since first IBM Personal Computer launched (38 y)...more
is 25 x Lifespan of horse (30 y)...more
is 50 x Lifespan of a cat (15 y)...more
is 400 x Period of Mars's orbit (1.88 y)...more

If this was a standard unit ...