The adult human brain weighs about 3 pounds (1,300-1,400 g).
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
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
There are about 1,400 different species of bacteria in your belly button.
10
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59