Duration of Egyptian Empire

Duration of Egyptian Empire (500 y)

/fact/duration-of-egyptian-empire

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Neat Ratios ...

Duration of Egyptian Empire (500 y)

is about as big as Duration of Carthaginian Empire (504 y)...more
is about as big as Duration of Roman Empire (503 y)...more
is 2 x Period of Pluto's orbit (248 y)...more
is 20 x One average human generation (25 y)...more
is 250 x Lifespan of rat (2 y)...more

If this was a standard unit ...