Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The oldest recorded elephant lived for 82 years.
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A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
Dolphins have names for one another.
18
Denmark has twice as many pigs as there are people.
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