The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Your body is creating and killing about 2.4 million red blood cells per second.
17
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