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
Condoms were originally made of animal intestines or linen.
347
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4