The subject of symmetry is quite fascinating. I learned about it when I was in high school and ever since I have had a certain fascination towards it. A symmetry is a principle of invariance, meaning that some feature in a physical system is preserved after making a transformation. For example, some well-known symmetries in physics include:

  • Lorentz symmetry
  • Duality symmetry
  • Gauge symmetry

As to why nature seems to be so symmetrical, no one really knows! But you may find amusing the Feynman video on symmetries in the RHS of this paragraph.


For the past years, I have been collecting papers (not necessarily very technical) about symmetries and their extraordinary role in physics.