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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The Severn Estuary is home to huge numbers of sprats and salmon, and the twaite shad, a protected migrating species which spawns in the tributaries of the River Severn.

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"Those that fail to do this – or ignore legally binding requests from us – should expect to face fines," he added.

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