There are about 1,400 different species of bacteria in your belly button.
10
One human hair can support 3 ounces.
191
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
Your body is creating and killing about 2.4 million red blood cells per second.
17
Your thumb is about the same size as your nose.
124
Within three days of death, the enzymes that once digested your food begin to eat you.
22
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
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