A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
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If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
If your DNA was stretched out it would reach to the moon 6,000 times.
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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.
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The human brain doesn't stop developing until about 25 years old.
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Research has determined that most people are happiest at 7:26pm on a Saturday night.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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