Q What was the structure on the nose of a Pachyrhinosaurus made of?
- A Cartilage (the same soft material as human ears and noses)
- B Enamel (the same hard material as the surface of teeth)
- C Keratin (the same material as human nails and hair)
C Keratin (the same material as human nails and hair)
Traces of blood vessels and ligaments have been discovered around the boss on the fossils, leading to the theory that a massive horn made of keratin, much like a rhinoceros horn, sat on top of it.
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