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A handout photo made available 24 June 2019 by Loro Parque Zoo shows orcas in captivity in Puerto de la Cruz, Tenerife, Canary Islands, Spain. Loro Parque Zoo has published a recent study in “zoo biology” that reveals the way in which killer whales make up after an argument. According to this study, two killer whales will pinch each other's tongues without actually biting in a ritual that comes after an argument. (Photo by Loro Parque Zoo/EPA/EFE/Rex Features/Shutterstock)
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