Archimedes' screw: a screw inside a hollow pipe, it is used to transfer water from a low area to a higher one, the screw was turned around by hand using a crank, , Archimedes' Claw: weapon, it was used to defend the city of Syracuse from the Romans, It was similar ro a crane that had a hook to lift up the attacking ships, , Isaac Newton: English mathematician, astronomer, physicist, laws of motion, law of gravity, ,

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