恐龙灭绝之谜：6千万年前有几个陨星撞击了地球？ - BBC
8/19/2022 12:00:00 AM2 years 8 months ago
by https://www.facebook.com/bbcworldservice/
by https://www.facebook.com/bbcworldservice/
6600万年前一颗巨大的陨星撞击地球给恐龙带来灭顶之灾，当时是否还有较小的陨星伴随它撞向了地球？
Max Alexander/B612/Asteroid Day
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