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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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
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It takes approximately 12 hours for food to entirely digest.
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The human brain doesn't stop developing until about 25 years old.
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Mushrooms are more closely related to humans than they are to plants.
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An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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