> They needed to develop surgical techniques for implanting electrodes into a mouse’s brain and, crucially, keeping them in place for many weeks.

Poor poor mice. Vivisection is done for the 'greater good', but not for the greater good of the millions (billions?) of critters who have suffered it. Yes I know that modern physiology is premised on it as method, the knowledge of organisms as they live not as they are dead, but what a toll.