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:jinan资讯

Жители Санкт-Петербурга устроили «крысогон»17:52

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class DatabaseStorage {

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Other people question the utility of solving the problem at all