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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2026-02-28 11:15去年还说去火星，今年要在月球建城市，马斯克是变脸还是有新计划？飞说智行

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The heavy，推荐阅读同城约会获取更多信息

Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00563-3

杜耀豪的母亲与兄弟姊妹的合影，摄于1954年。（受访者供图）

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In our first pass, we will make the orthography more modern. In Old English letters like g and c represent two different sounds, so where appropriate I have replaced them with how Modern English renders them. The rules applied are as follows: