Time since the publication of Darwin's On the Origin of Species

Time since the publication of Darwin's On the Origin of Species (165 y)

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Neat Ratios ...

Time since the publication of Darwin's On the Origin of Species (165 y)

is 1/250 of Age of oldest musical instrument (42,000 y)...more
is 1/40 of Age of the earliest city (6,500 y)...more
is 1/10 of Time since the birth of mathematician Hypatia (1,674 y)...more
is 2/5 of Time since the death of Shakespeare (406 y)...more
is about as big as Time since the publication of Dickens's Tale of Two Cities (165 y)...more
is about as big as Period of Neptune's orbit (164.8 y)...more
is 2 x Period of Uranus's orbit (84 y)...more

If this was a standard unit ...