'Surreal' killing of 4 chimpanzees has zoologist reconsidering ties with Swedish zooSantino and Linda, well known to the Swedish public, were among the apes killedCognitive zoologist Mathias Osvath cannot wrap his head around why the Furuvik Zoo fatally shot four of Sweden's beloved chimpanzees.Furuvik Zoo was closed to the public, and temperatures were around –15 degrees, but it took days for the zoo to bring the situation under control.A spokesperson for the group operating the zoo, Annika Troselius, told Swedish broadcaster SVT, "We have to think about people's lives and safety in the first place.By watching Santino, Osvath saw the chimp calmly plan and strategize for the instances when he was not so calm later in the day, during his outbursts.Santino went on to be a part of further research, including an Ig Nobel Prize-winning study for anthropology in 2018, which suggested that the Furuvik Zoo's chimps were just as likely to imitate their human visitors as the other way around."