Thirteen discoveries that help explain why matter and energy behave as they do:
-Galileo's law of falling bodies
-Isaac Newton's conclusions of universal gravity
-Newton's laws of motion
-The second law of thermodynamics
-Experiments in electromagnetism
-Albert Einstein's Special Theory of Relativity and his equation E=mc2
-Quantum theory
-Calculations on the nature of light
-James Chadwick's discovery of the neutron
-The development of superconductivity
-Murray Gell-Mann's proposal of quarks
-The discovery of the strong and weak nuclear forces
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