A chimpanzee in Furuvik Zoo of Sweden became so annoyed at being gawked at by tourists that he started creating weapons to hurl at them, scientists have found.

• 瑞典福鲁维克动物园的一只黑猩猩觉得一直被游客盯著看很烦，开始制造武器扔向他们，科学家发现。