By weight, Bone is five times stronger than steel.
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In Mexico, artists can pay their taxes using artwork that they create.
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Water, electricity, and gas has been free in Turkmenistan since 1991.
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Passengers on the Beijing subway can pay with plastic bottles.
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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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Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
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