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What important thing did King Alfred learn when he penetrated the Danish camp of Guthrum? Alfred the Great acted as his own spy, visiting Danish camps 阅读全文
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What makes trading between rich countires difficult? Chickens slautered in the United States, claim officials in Brussels, are not fit to grace Europe 阅读全文
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In what way does echo-location in bats play a utilitarian role? Not all sounds made by animals serve as language, and we have only to turn to that ext 阅读全文
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How does the writer describe sport at the international level? I am always amazed when I hear people saying that sport creates goodwill between the na 阅读全文
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How does the writer like to treat young people? People are always talking about 'the problem of youth'. If there is one -- which I take leave to doubt 阅读全文
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How did vera discover she had this gift of second sight? Several cases have been reported in Russia recently of people who can read and detect colours 阅读全文
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What was the main objective of early mountain climbers? Morden alpinists try to climb mountains by a route which will give them good sport, and the mo 阅读全文
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How much of each year do spiders killing insects? Why, you may wonder, should spiders be our friends? Because they destroy so many insects, and insect 阅读全文
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Why are legends handed down by storytellers useful? We can read of things that happend 5000 years ago in the Near East, where people first learned to 阅读全文
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What influences us from the moment of birth? Custom has not commonly been regarded as a subject of any great moment. The inner workings of our own bra 阅读全文