Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
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
When you shave a guinea pig it looks like a little hippo.
19