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FRACTAL Research by DdO:) - - MIT, Harvard, & U of Mass Medical School researchers show DNA is a fractal globule. This design resists knotting & allows DNA regions on a chromosome to remain near each other in the 3D structure. if the double helix did not fold further, each cell's genome would be two meters long — far too large to fit into the nucleus of a human cell, about 1/100th of a millimeter in diameter. Photo via LesterArt