Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23