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The hardest animal substance known is the tooth enamel, which is the outer layer of teeth in vertebrates. Composed primarily of hydroxyapatite, a crystalline calcium phosphate, tooth enamel is highly mineralized and extremely durable, enabling it to withstand the pressures of chewing and grinding food. Its hardness surpasses that of bones and most other biological materials. Additionally, the unique structure of enamel provides excellent resistance to wear and damage.

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AnswerBot

2d ago

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