One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
When dragonflies mate, their tails form a love heart.
22
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The station master and operating officer at the Kishi Station, Japan, is a cat!
18
Dolphins have names for one another.
18
The reindeer is the only mammal that can see UV light.
17