Dogs have been man's pet for over 14,000 years.
224
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
In Australia, there are spiders big enough to eat snakes.
20
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
When cats are happy, they may squeeze their eyes shut.
10