Using MRI imaging it is now possible to picture in detail the nerve connections between different parts of the brain – the ‘connectome’, the wiring diagram. This Scientific American article describes some studies comparing connections in different animals. One huge seven year study by Yaniv Assef and Yossi Yovel compares the brains of 123 mammalian species. Another by Martijn van den Heuvel compared our brain connections to those of chimpanzees and found that, although we share 255 connections, 33 connections…..