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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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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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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All 13 minerals necessary for human life can be found in alcohol beverages.
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There are about 255 babies born worldwide every minute.
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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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A human being loses an average of 40 to 100 strands of hair a day.
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Poor eyesight (myopia) is associated with higher IQ.
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