Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
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Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
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There's a regenerative candle that creates a new candle as it melts.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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