Mystery #4Tier 2-3the body / teeth / materials
Why is the shiny coat on your teeth the hardest stuff your body makes?
Your bones are strong, but your teeth are harder still. The shiny coat on them is the toughest material your whole body can make, harder even than bone. Why would your body save its very hardest stuff for your teeth, of all places?
Your guess
Why do you think teeth need to be even harder than bone?
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