Time since start of building of the Colosseum

Time since start of building of the Colosseum (1,944 y)

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Neat Ratios ...

Time since start of building of the Colosseum (1,944 y)

  • is 1/2500 of Age of earliest mammoth fossils (4.8 m y)...more
  • is 2 x Time since the birth of Omar Khayyam (970 y)...more
  • is 2.5 x Time since the birth of Marco Polo (764 y)...more
  • is 10 x Time since the first iron steamship crossed the English Channel (196 y)...more
  • is 10 x Time since the first passenger steam railway service (193 y)...more
  • is 40 x Time since the first man walked on the moon (49 y)...more
  • is 40 x Time since first Boeing 747 entering service (48 y)...more

If this was a standard unit ...

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