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yong you xian dai ya chi de yuan gu nie chi shou
Pages: 29
Year: Issue:  1
Journal: Knowledge is Power

Abstract: 近年,中国和美国科学家在内蒙古一个有着1.65亿年历史的道虎沟湖床中,发现了恐龙时代的哺乳动物的化石.经过科学家仔细考证,这是一种以前没有发现过的远古哺乳动物.更加令科学家们感到惊奇的是,这枚化石显示数亿年前的这类哺乳动物竟然拥有了现代牙齿.……
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