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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Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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A person can live without food for about a month, but only about a week without water.
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Our brains have a negativity bias and will remember bad memories more than good ones.
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Babies crawl an average of 200m a day.
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Research has determined that most people are happiest at 7:26pm on a Saturday night.
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On average, there's 100 billion neurons in the human brain.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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