You mean the crazy theory this guy came up with after observing how Native Americans breathe through their noses? https://en.wikipedia.org/wiki/George_Catlin#O

You mean the crazy theory this guy came up with after observing how Native Americans breathe through their noses? https://en.wikipedia.org/wiki/George_Catlin#Observations_on_Native_mouth_breathing_practices https://en.wikipedia.org/wiki/George_Catlin#Observations_on_...