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All cats need taurine in their diet to avoid blindness. Cats must also have fat in their diet as they are unable to produce it on their own.

The technical term for a cat’s hairball is a “bezoar.”

A cat has more bones than a human; humans have 206, but the cat has 230 (some cites list 245 bones, and state that bones may fuse together as the cat ages).

Retractable claws are a physical phenomenon that sets cats apart from the rest of the animal kingdom. I n the cat family, only cheetahs cannot retract their claws.