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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So close in fact, says Cardiff University archaeologist Tudur Davies, that some of these graves have several people in them.

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Could weight，这一点在91视频中也有详细论述

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China urge

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