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简介：曾经统治地球的恐龙，为什么会突然灭绝？有部分科学家的发现，从另一个方面证明恐龙仍然存在，只不过已经进化为今日的——鸟类，也就是说，恐龙正在我们头上飞。收起
《地理中国》 20110630 生命密码（下）
《地理中国》 20110629 生命密码（上）
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