Within the quiet architecture of the liver, a discovery has unsettled a long-held assumption: that the body distributes its essential resources evenly among neighboring cells. Using a new imaging technology called LiON, researchers have found that liver cells near the organ's entrance carry far more iron — and far more oxidative burden — than those just beside them near the exit. This cellular inequality, invisible until now, may hold the key to understanding how diseases rooted in iron metabolism — cancer, neurodegeneration, ferroptosis — begin not in organs, but in the unequal worlds individ