The big idea of Grand Unified Theories of physics
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Whenever we think about the Universe at a fundamental level, there’s always the temptation to wonder if reality might somehow be simpler than we perceive it to be. As complex and diverse as the natural world is, it’s humbling to recognize that everything we see, perceive, and interact with is made of the same building blocks. Matter is made of atoms, which are made of protons, neutrons, and electrons; protons and neutrons are further made of quarks and gluons. There are other particles as well:...

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