There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Scientists have developed a 'hangover-free' beer that has electrolytes, making it more hydrating and refreshing.
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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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Ernest Vincent Wright wrote a 50,000 word book titled 'Gadsby' which did not use the letter "e".
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