文章列表
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1.万物简史 第604期:冰河时代(1)
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Part VI The Road To Us 第六部 通向我们的路 Descended from the apes! My dear, let us hope that it is not true, but if it is, let us pray that it will n...
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2.万物简史 第603期:生命的物质(29)
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It can all begin to seem impossibly complicated, and in some ways itis impossibly complicated. But there is an underlying simplicity in all this, too,...
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3.万物简史 第602期:生命的物质(28)
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Proteins, you will remember, are the workhorses of all living systems; as many as a hundred million of them may be busy in any cell at any moment. Tha...
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4.万物简史 第601期:生命的物质(27)
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In the early 1990s, scientists made an even more profound discovery when they found they could knock out supposedly vital genes from embryonic mice, a...
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5.万物简史 第600期:生命的物质(26)
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This is clearly a pity in one important sense, for if you had individual genes that determined height or propensity to diabetes or to baldness or any ...
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6.万物简史 第599期:生命的物质(25)
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We have forty-six chromosomes, but some ferns have more than six hundred. The lungfish, one of the least evolved of all complex animals, has forty tim...
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7.万物简史 第598期:生命的物质(24)
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The story was the same wherever researchers looked. They found that they could insert human DNA into certain cells of flies, and the flies would accep...
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8.万物简史 第597期:生命的物质(23)
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Altogether, almost half of human genes the largest proportion yet found in any organism don't do anything at all, as far as we can tell, except reprod...
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9.万物简史 第596期:生命的物质(22)
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(Junk DNA does have a use. It is the portion employed in DNA fingerprinting. Its practicality for this purpose was discovered accidentally by Alec Jef...
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10.万物简史 第595期:生命的物质(21)
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By such means does Darwinian natural selection look after us. It also helps to explain why we are all so similar. Evolution simply won't let you becom...