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A single gene called FOXP2 differs by just two amino acids between humans and chimpanzees, and when researchers gave mice the human version, neurons in a brain region tied to habits grew longer branches and their pups' squeaks came out slightly lower and flatter
The gene once sold as the "language gene" did not bring mice any closer to talking, but it may have made them quicker to turn a deliberate routine into a habit. By Sanchana Charles · Edited by Ainura Kalau Published October…