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The first case of ursine tool use 第一只会用工具的熊 Ready for my close-up, Dr Deecke Deecke博士，准备给我来张特写吧 PRIMATES apart, few mammals employ tools. 除了灵长类动物，会使用工具的哺乳类动物屈指可数。 Sea otters use rocks to smash clams open, 海獭会在石头上砸开蛤蜊; dolphins wrap sponges around their noses to protect themselves while they forage on theseabed, 海豚在海床上觅食时，会将海绵绑在鼻子上以保护自身; elephants swat insects with branches and humpback whales exhale curtains of bubbles totrap schools of fish. 大象会用树枝拍打昆虫;驼背鲸会呼出阵阵气泡来困住鱼群。 Until now, these four examples had been thought the extent of the non-primatemammalian tool-users club. 至今，人们仍认为非灵长类动物中只有这四种会使用工具。 But a study just published in Animal Cognition, by Volker Deecke of the University of StAndrews, in Britain, has added a fifth and rather surprising one. 但英国圣安德鲁大学的Volker Deecke在《动物认知》上刚发表的研究指出了第五种会用工具的动物，而且是令人相当意外的一种。 | 
