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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帝國理工學院醫療NHS信託（Imperial College Healthcare NHS Trust）的顧問婦科醫生理查德・史密斯教授（Prof Richard Smith）25年前就開始研究子宮移植，並親自見證了雨果的誕生。他表示，「一支龐大的團隊」參與了整個過程——從移植手術、胚胎移植到分娩本身。