Most societies have a complex relationship with human poop. It brings up all kinds of emotions: disgust, fascination, shame, happiness, relief, and even pride. It’s something we can all relate to though. Everyone poops!

Visit Mr. Toilet House in Suwon, South Korea where visitors from all over the world come to learn about the history of human waste.

Dr. Shannon Yee is taking on Thomas Crapper for a place in the Toilets Hall of Fame. He has designed a toilet that takes the water almost completely out of the equation.

Lina Zeldovich is no stranger to talking about poop-back in Russian her grandfather used their waste as compost and now she has literally written the book on poop, it's called The Other Dark Matter.

Lindsay Stradley saw firsthand how combining water with human waste can lead to serious problems. She resolved to improve urban sanitation and started Sanergy, a company that provides container-based facilities and now serves over 150,000 Nairobi residents.