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Text: A Greek mathematician and inventor, Archimedes invented a spiral pump for raising water. The pump, called an Archimedian screw is still used. He discovered differential calculus and the formula for the volume of a sphere. He is best known for his work on the principles of buoyancy, which he is alleged to have discovered when sitting in a bath and noticing how his body displaced the water. He was killed by a Roman soldier during an invasion of his home city of Syracuse. Each paragraph will be a test.

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