Biospeleology and the Dark, Dank World of Caves: Stuff You Should Know Animated

Most living beings rely on a common energy source to sustain themselves - sunlight. So how do the creatures inhabiting dark, dank caves untouched by the Sun do it? It's called the food chain, with a generous dollop of bat guano. Tune in to find out more!

Become an amateur biospeleologist with this week's installment of Stuff You Should Know: Animated.