How kittens' skulls are cracked open and electrodes inserted into their brains in shocking series of experiments at 10 UK universities including Cambridge

Revealed: How kittens' skulls are cracked open and electrodes inserted into their brains in shocking series of experiments at 10 UK universities including Cambridge

WARNING GRAPHIC CONTENT: The cruel procedures carried out at institutions such as University College London were performed to improve scientists' understanding of the human body.