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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"It's producing fragments of building stone, so it might be structural. We might be thinking of a small shrine or a chapel," says Dr Andy Seaman, from Cardiff University, who is leading the dig.，详情可参考同城约会

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