Brass doorknobs automatically disinfect themselves in about 8 hours.
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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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While pumpkins are typically orange, they can also be green, white, red, gray, and even blue.
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Coffee comes from an edible fruit. The coffee cherry is sweet and tastes like watermelon, rosewater, and hibiscus all at once.
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