Cows can sleep standing up, but they can only dream lying down.
745
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
The elephant brain weighs about 6,000g.
274
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
A puppy is born blind, deaf, and toothless.
16
In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
9
Sheep, goats, octopuses, and toads have rectangular pupils.
7