----- 曾经的和未来的巨人:冰河时期灭绝告诉我们地球的最大的动物的命运
At the close of the last Ice Age--right as the first humans reached the Americas--a whole menagerie of giant beasts vanished forever. In Once and Future Giants, Sharon Levy argues that understanding this mass extinction will be critical to the protection of threatened species worldwide.
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