|OK, so everyone knows how big 1 penny is. It's also easy to visualize 16 stacked pennies. How about $10 worth of pennies (1,000 pennies)? 50,000 pennies? 1 million pennies? 10 million pennies? How much pennies does it take to fill up the Sears towers?
This website explains it all: the MegaPenny Project
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