A group of kittens is called a "kindle".
10
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
The reindeer is the only mammal that can see UV light.
17
The largest earthworm on record was found in South Africa and measured 22 feet.
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