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
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
You see your nose at all times, your brain just chooses to ignore it.
30
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
There are about 1,400 different species of bacteria in your belly button.
10
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In one day, adult lungs move about 10,000 litres of air.
11