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.

· · 来源：dev资讯

10 of the weirdest little freaks in Pokémon history

Watch: BBC in Nancy Guthrie's hometown as sniffer dogs help search for clues

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When she received a phone call saying a womb had been donated and a transplant was possible, Bell remembers being "in complete shock" and "really excited".

Фото: Kacper Pempel / Reuters

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