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
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Gorillas can catch human colds and other illnesses.
205
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
A human being loses an average of 40 to 100 strands of hair a day.
133
Babies crawl an average of 200m a day.
212