Time since the birth of Leonardo da Vinci

Time since the birth of Leonardo da Vinci (567 y)

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Neat Ratios ...

Time since the birth of Leonardo da Vinci (567 y)

is 1/5000 of Time since the emergence of earliest humans (2.8 million y)...more
is 1/20 of Time since the earliest farming (11,500 y)...more
is 1/4 of Time since the birth of Archimedes (2,300 y)...more
is 1/4 of Time since the birth of Eratosthenes (2,294 y)...more
is 1/4 of Time since start of building of the Great Pyramid of Cholula (2,250 y)...more
is 4 x Time since the birth of Einstein (140 y)...more
is 5 x Time since the publication of Einstein's theory of Special Relativity (114 y)...more
is 5 x Time since the birth of computer scientist Grace Hopper (113 y)...more

If this was a standard unit ...