Bows and arrows, firearms, missiles and poop? The progress of invention marches forward through time as humans discover a new material to use in the manufacturi

Bows and arrows, firearms, missiles and poop? The progress of invention marches forward through time as humans discover a new material to use in the manufacturi

Imagine stopping at a gas station, and filling your car with...poop. Fuel made from poop may sound like science fiction, but it's already science fact. This eng

Why did medieval physicians fill a patient’s nostrils with hog’s dung? Can eating camel poop really help cure dysentery? And why are 21st-century doctors ca

Everything I Know About Poop gives parents an innovative and fun way to help their toddlers achieve toilet-training success, especially the stubborn ones. It us