There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
One human hair can support 3 ounces.
191
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There's 100 trillion good bacteria living in your body.
17
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
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