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  • FishKnight
    +4

    The case of the traveling twins. I just cannot wrap my head around this one. This is how I know that other people are way smarter than I am.

    • Guilhem
      +4

      Leaving Newtonian mechanics for special relativity is a scary step. It really takes time to "get" it.

      Interferometry is a good way to start if you want to learn.