Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
A domestic cat can sprint at about 31 miles per hour.
274
A cow produces around 200,000 glasses of milk in her lifetime.
373
When cats are happy, they may squeeze their eyes shut.
10
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
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20