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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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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There is a surgical implant being developed that will give you an orgasm at the touch of a button.
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Balsa wood is classified as a hard wood!
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Sound travels about 4 times faster in water than in air.
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