You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Your heart will pump about 212 million liters in its lifetime.
26
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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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 adult human brain weighs about 3 pounds (1,300-1,400 g).
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