Human Urine Has Been Very Useful Throughout History. It Has Been Used for Tanning Hides, Cleaning Clothes, Making Gunpowder, and Brushing Teeth to Make Them Whiter.
Your urine, believe it or not, has a purpose. Since ancient times, scientists and inventors with steel stomachs have known that liquid waste can be helpful. The Romans traded in urine, collecting it publicly and paying taxes. People all over the world have used urine, both human and animal, for a variety of purposes throughout […]