Kids love to read about gross things like pee. But few realize how fascinating, and even educational, the subject can be. You can learn about all sorts of things from pee-American history (Civil War belles hoarded urine for making gunpowder); the animal kingdom (when lobsters fight they squirt each other with pee from bladders on either side of their eyes); even espionage (scientists are using urine to classify "odor types " that will identify individuals...
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Anatomy & Physiology Biology Children's Children's Books Science, Nature & How It Works