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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集市热热闹闹,总也走不完,像春节庙会。小时候见过扭秧歌、跑旱船、踩高跷,也看放烟花,像看唱戏一样。晚上冻得嘶嘶哈哈,杵在那儿。玩火药的蔡国强,我老感觉见过——冬拍了太多名人,照片多是我挑,挑来挑去,成了老熟人,好像街坊邻居。