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"Except it'd be a map about 50,000 times as big as the U.S., with 50,000 times as many roads and intersections..."

Great! So now, all you have to do is give some sort of a comparison that lets people visualise exactly how big an area 50,000 times the size of U.S. is. May I suggest a metric based on whales?

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Average whale length = 12.8m (from top google search for average whale length)

Area of the US = 9.826630x10^6 km^2 or 9.826630x10^12 m^2

Area in whales of the US = 5.99769897x10^10 whales^2

So that would be 50000 times the size of 6 x 10^10 whales^2! Thats a lot of whale!

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