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Condoms were originally made of animal intestines or linen.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
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Squirrels forget where they hide about half of their nuts.
698
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
A dairy cow can produce more milk when listening to music.
446