Symmetry in Physics, Pt. 2: Discrete Symmetries and Antimatter - US LHC Blog - 0 views
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Charles Daney on 03 Oct 09The spacetime symmetries we discussed in the previous post can be expanded to include three discrete symmetries: parity, charge conjugation, and time-reversal. It turns out (rather surprisingly) that physics chooses not to obey these symmetries, and this act of rebellion allowed the universe to develop interesting things like galaxies and life.