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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However, she and her parents realised after his death that there was no list for people willing to donate - something they campaigned for relentlessly until its introduction in 1994.

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