Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
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In one day, adult lungs move about 10,000 litres of air.
11
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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When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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Pain occurs when sounds are above 130 db.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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On average, there's 100 billion neurons in the human brain.
83
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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