The craving for and practice of eating earth is more widespread than you might think. Learn why researchers think people engage in this form of pica (i.e., geophagy) in today's classic episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/cultural-traditions/why-do-people-eat-dirt.htm

What Advice About Lightning Is Wrong?
09:54

How Did Wild Bill Hickok Become America's First Gunslinger?
12:40

What Colors Are Impossible?
14:05