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:tutorial资讯

John Fingleton, who wrote the report, singled out Hinkley Point's elaborate fish protection measures as a case study of "overly cautious regulation".

But this week, a US Commerce Department official told lawmakers that none of those chips have yet been sold to Chinese customers.

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iFi's new

Some experts say this signals the start of a new space race – not just for prestige, but to build a long-term presence on the Moon, tap its resources and use it as a stepping stone to Mars. We speak to the BBC’s Science Editor, Rebecca Morelle.