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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The 1,500-year-old skeletons are intact and well preserved

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平台也在回应相关质疑。“灵师”曾向平台建议引入心理专家等专业资源，为未成年人提供心理疏导和矛盾化解服务。平台方面表示，点赞与主页功能的初衷是为了让用户更好地展示自己，并非盈利。“他们或许没料到会衍生出这么多问题，但应该积极回应处理。”“灵师”说。

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用产品经理的心态对待咖啡，不断迭代好喝的咖啡。公众号：咖啡平方