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Keratin. Keratin is the stuff that that makes hair, nails, fur and claws.
A rhino's horn is made out of matted hair that grows from the skull without skeletal support.
A Rhino's horn is made out of the protein keratin, which is also the main component of hair.
A rhino's horn is made out of matted hair that grows from the skull without skeletal support.

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14y ago

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