Attitudes towards experimenting on monkeys are diverging

IN 2014 A GERMAN animal-rights group called SOKO Tierschutz planted a caretaker in the laboratory of Nikos Logothetis, a neuroscientist working at the Max Planck Institute in Tübingen. The infiltrator secretly filmed around 100 hours of lab work over six months, some of which was later broadcast on German television. The footage showed monkeys with metal plugs grafted into their skulls—ports which researchers used to probe and study their brains. One vomits on camera, apparently as a result of damage done to blood vessels in its brain while electrodes were inserted.