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.

· · 来源：user资讯

63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54

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Musk promised it will have "the manual dexterity of a human, meaning a very complex hand".

says Sam Altman

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