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：study资讯

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Author(s): Pedro P.P.O. Borges, Robert O. Ritchie, Mark Asta，这一点在safew官方版本下载中也有详细论述

A decline

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A Secret Soviet Plan to Nuke America From the South Pole Was Working. Until UFO Hunters Looked Up.