Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
The human brain doesn't stop developing until about 25 years old.
102
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A human being loses an average of 40 to 100 strands of hair a day.
133