Crocodile brains barely evolved in 100 million years, CT scans reveal

For a hundred million years, as continents drifted and dynasties of life rose and fell, the crocodilian brain remained almost perfectly still — a quiet constant inside a body that changed its shape, its range, and its prey. Researchers at the Swedish Museum of Natural History, using CT scans to peer inside ancient skulls without disturbing them, have confirmed what the fossil record quietly suggested: that evolutionary success does not always demand reinvention. In the crocodile, nature appears to have found an answer early and seen no reason to revise it.