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:tech资讯

Nicknamed the father of environmental justice, Robert Bullard argues that researchers in the field have more reason than ever to back up their work with action.

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Jones also noted how Davidson's bike had been stolen on the night of the awards, but was later found by police.

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