Bats sleep 18-20 hours per day.
5
The octopus does not have a blind spot.
273
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
Lurch, a Watusi bull, had the largest horns in the world.
32
Cows can sleep standing up, but they can only dream lying down.
745
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12