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：guide资讯

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Kosmos 482, which launched in 1972 on a mission to Venus, never made it out of Earth's orbit and instead broke into four pieces that have been circling the planet for more than five decades.

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英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊

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