There's theories out there that bacteria that oxidizes ammonia would have been pretty common. Before treated water and daily soaping. https://www.nytimes.com/2

There's theories out there that bacteria that oxidizes ammonia would have been pretty common. Before treated water and daily soaping. https://www.nytimes.com/2014/05/25/magazine/my-no-soap-no-shampoo-bacteria-rich-hygiene-experiment.html https://www.nytimes.com/2014/05/25/magazine/my-no-soap-no-sh...