Rhinoceros

The rhinoceros (commonly called rhino for short; plural can be either rhinoceros or rhinoceroses) is any of five surviving species of odd-toed ungulates in the family Rhinocerotidae. All five species are native to Africa or Asia.

 

Also, as Janine Benyus points out, "Rhino horn surprises us by healing when cracked, even though the horn has no living cells in it. We don't know how it manages to do that, but what a great model for self-healing materials that wouldn't have to be thrown away!"

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