The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Mushrooms are more closely related to humans than they are to plants.
47
There are about 255 babies born worldwide every minute.
46
Obsessive nose picking is called Rhinotillexomania.
101
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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