Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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安德烈·塔可夫斯基(左)、娜塔莉亚·邦达尔丘克(中,饰哈丽)和尤里·亚尔韦特(饰斯纳乌特)在《飞向太空》拍摄现场 图/《殉道学:塔可夫斯基日记 1970-1986》

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Scientists have said mackerel supplies in the north-east Atlantic have fallen into a danger zone

Publication date: 28 February 2026

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It doesn’t have a steep learning curve