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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AI产业链的三层架构：从“卖铲子”到“淘金客”的价值传导要理解上游企业业绩与股价的诡异背离，就需要回到AI产业链的三层架构——一个形象的“淘金热”比喻，能清晰拆解各环节的价值逻辑与生存现状，进而找到这一矛盾的根源。

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The team has yet to determine whether it will visit the White House after USA Hockey cited logistics and travel issues in declining President Donald Trump’s invitation to join the U.S. men’s gold medal-winning team at the State of the Union on Tuesday.