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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
In one day, adult lungs move about 10,000 litres of air.
11
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Within three days of death, the enzymes that once digested your food begin to eat you.
22