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What are the horns of rhinos composed of?

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What are the horns of rhinos composed of?
posted Sep 7, 2017 by Neeraj Kumar

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The horn is composed primarily of a protein called keratin--the same substance that makes up human hair and nails.
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Some other Information
Rhinos have only mineral deposits of calcium and melanin at the core of their horns, more akin to hooves and beaks, according to researchers at Ohio University.

answer Jan 22, 2018 by Alivia Clark
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