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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Мерц резко сменил риторику во время встречи в Китае09:25

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Andrew Robinson reviews five of the best science picks.

'Is this a

The star, who has died at the age of 48, spoke to the BBC in 2003 about his feelings on leaving his best-known role.