Toilet paper isn't universal. Much of the world uses water to cleanse their behinds. But many of us cannot imagine life before our precious TP, or at least a high-pressure bidet. However, for the vast majority of human history, we made due when we made doo-doo. (Sorry, had to get some toilet humor in.) Read on to never doubt the power of human innovation again.

Source: New Humanist

Source: Ohio State University

Source: Mental Floss

Source: They Eat Horses, Don't They? The Truth About the French

Source: Smithsonian Magazine