Time since start of building of the Colosseum

Time since start of building of the Colosseum (1,950 y)

/fact/time-since-start-of-building-of-the-colosseum

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Time since start of building of the Colosseum (1,950 y)

is 1/2500 of Age of earliest mammoth fossils (4.8 million y)...more
is 2 x Time since the birth of Omar Khayyam (976 y)...more
is 2.5 x Time since the birth of Marco Polo (770 y)...more
is 4 x Time since the publication of Copernicus's sun-centred model of the solar system (481 y)...more
is 20 x Time since Charles Lindbergh first flew across the Atlantic (97 y)...more
is 40 x Time since Concorde Supersonic Airliner entered service (48 y)...more

If this was a standard unit ...