Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Denmark has twice as many pigs as there are people.
66
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Penguins have a gland above their eye that turns saltwater into freshwater.
12
A puppy is born blind, deaf, and toothless.
16