'''Modern physics''' refers to [[quantum mechanics]], the [[theory of relativity]], the expanding universe, and mostly untestable theories of [[string theory]] and multiple universes.
'''Modern physics''' refers to [[quantum mechanics]], the [[theory of relativity]], the expanding universe, and mostly untestable theories of [[string theory]] and multiple universes.
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== See also ==
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*[https://www.quantamagazine.org/the-biggest-discoveries-in-physics-in-2023-20231221/ The Year in Physics 2023]