Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Only 3% of bird species have penises.
0
There's a rare breed of pig that looks like a sheep.
14
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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