A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
Domestic pigs average a top speed of about 11 miles per hour.
182
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
An elephant's tooth can weigh as much as 12 pounds.
24
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
A queen bee uses her stinger only to sting another queen bee.
39
Contrary to popular belief, possums, squirrels, chipmunks, and mice do not carry rabies.
28