Brian Engh on X: "@Tomozaurus @fishboy86164577 Yup. Just show them the published literature or a picture of an actual horn core / keratin sheath ;} This great figure from the Borealopelta research
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![For a Useless Horn Made of Keratin [ http://en.wikipedia.org/wiki/Keratin ] - Quorans For A Cause - Quora For a Useless Horn Made of Keratin [ http://en.wikipedia.org/wiki/Keratin ] - Quorans For A Cause - Quora](https://qph.cf2.quoracdn.net/main-qimg-0b6d30de8fcf664005e51b64acd102ea.webp)