A 1940s Math Trick Just Unlocked the Hidden Rules Written Inside Your DNA
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Inside the nucleus of every cell, DNA doesn’t float freely. It’s wound, folded, bundled into a dense tangle of proteins and genetic material called chromatin, which compacts roughly two metres of DNA into a space just a few millionths of a metre across. Within that tangle are tiny domains, each about 100 nanometres wide (smaller than the wavelength of visible light, for context), and these domains are, in a real sense, where the action is. They control which genes get switched on, wh
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