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
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.
34
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
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The human eye blinks an average of 4,200,000 times a year.
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We share 70% of our DNA with a slug.
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In one day, adult lungs move about 10,000 litres of air.
11
Research has determined that most people are happiest at 7:26pm on a Saturday night.
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