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：learn资讯

力高顧問有限公司是黎智英與助手馬克·西蒙（Mark Simon）經營的企業，登記地址曾為壹傳媒總部大樓。

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Getting ch，更多细节参见同城约会

How to watch: American Classic premieres on MGM+ on March 1.

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