Height, Weight, Income: How Well Do You Know the Average American?
by Maria Trimarchi

The average human brain weighs about three pounds, and our head, as adults, weighs about 10 to 11 pounds. The human stomach is capable of holding an entire 32-ounce Big Gulp (maybe not comfortably, but it will all fit). All told, you think you know your fellow humans. See how well you really know your fellow Americans, inside and out.

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