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欧阳自远：冰层下发现巨大撞击坑？没那么神奇
source link: https://tech.sina.com.cn/d/s/2019-01-09/doc-ihqhqcis4589397.shtml
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来源：中国科学院国家天文台最近，丹麦哥本哈根大学的Kjær团队在格陵兰Hiawatha冰川厚厚的冰层下发现了一个巨大的撞击坑，是地球已知最大撞击坑TOP25，直径有31千米。那么发现这个撞击坑有什么意义？为什么要去研究陨石？中科院国家天文台
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