The interesting thing here is it actually makes sense that the older we get the more hair we need in our ears and noses.
For the ears the hair helps catch sound waves so it will improve hearing and the hair in the nostrils catches smells easier so helping the sense of smell.
Our hunter gatherer ancestors must have needed these things improved in order to survive as they got older. even though making it to the age of 30 back then was a miracle in itself I would think.
I saw that on some documentary about the hair though.
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