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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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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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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