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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The world's shortest man measures only 21.5 inches.
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On average, there's 100 billion neurons in the human brain.
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The human brain has the capacity to store everything that you experience.
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Your heart will pump about 212 million liters in its lifetime.
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Only humans shed emotional tears.
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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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Our Right Lungs takes more air than our left lung.
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