另外一个理论推测大型动物在13000年前的一次小行星撞击中被毁灭殆尽，然而最新的研究也否定了这种可能性。
Another theory, that the larger beasts were wiped out by an asteroid strike around 13, 000 years ago, also looks unlikely in view of the latest study.
另外一个理论推测大型动物在13000年前的一次小行星撞击中被毁灭殆尽，然而最新的研究也否定了这种可能性。
Another theory, that the larger beasts were wiped out by an asteroid strike around 13, 000 years ago, also looks unlikely in view of the latest study.
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