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Galileo improves microscope
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He discovered gravitational force and established the three Universal Laws of Motion
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electromagneic induction
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dicovers electromagnetic waves
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discover radium and polonium
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discovered alpha and beta rays, set forth the laws of radioactive decay, and identified alpha particles as helium nuclei.
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created the Bohr model of the atom
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Einstein discovered the theory of relativity and the mass energy
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remade quantum electrodynamics