Dogs have been man's pet for over 14,000 years.
224
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10