Time since the first iron steamship crossed the English Channel

Time since the first iron steamship crossed the English Channel (196 y)

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Neat Ratios ...

Time since the first iron steamship crossed the English Channel (196 y)

  • is 1/10 of Time since start of building of the Colosseum (1,944 y)...more
  • is 1/5 of Time since the birth of Omar Khayyam (970 y)...more
  • is about as big as Time since the first passenger steam railway service (193 y)...more
  • is 4 x Time since the first man walked on the moon (49 y)...more

If this was a standard unit ...

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