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Cassandra 11 month s ago
#6 It’s always the one my finger’s in.
       
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Micajah 11 month s ago
       
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Hodge 11 month s ago
Micajah,
Some idiot didn't get the science facts right, there is a DOMINANCE of one nostril, and it shifts every couple of hours to another one, but it sure is not 100% one nostril, in normal circumstances.
       
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Char 11 month s ago
#5 Doesn't explain why raised hair follicles would help with warmth. It's because the erect hair (once upon a time fur) would trap air which is an effective insulator for the same reason fiberglass wool is used as insulation in the walls in some forms of construction (eg, Canada & USA).
       
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yahooshoot

Teeth are not bones

 

Teeth have a coating called enamel (the hardest substance in the human body), are made of dentin underneath, and have a pulp full of nerves and blood vessels on the inside. Bones, by contrast, have fatty marrow and/or something called “spongy bone” on the inside, and the outside of the bone is coated in a membrane. Bone is full of collagen and blood vessels; the hard parts of teeth have neither.

 

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