Is That A Big Number?

If Duration of Egyptian Empire (500 y) was a standard unit ...

Duration of Carthaginian Empire (504 y)...more would be about as big as Duration of Egyptian Empire

Duration of Roman Empire (503 y)...more would be about as big as Duration of Egyptian Empire

Period of Pluto's orbit (248 y)...more would be 1/2 of Duration of Egyptian Empire

One average human generation (25 y)...more would be 1/20 of Duration of Egyptian Empire

Lifespan of rat (2 y)...more would be 1/250 of Duration of Egyptian Empire

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