Some of the species Miz Goodall discusses in the book have completely disappeared in the wild, and are only alive because they have been bred in captivity.

VOA: special.2009.11.18

Archaeologists in the nineteenth and twentieth centuries were stunned to find the ruins and the records of remarkable peoples and cultures--massive, complex empires in some cases, but some of which had completely disappeared from human memory.

十九和二十世纪的考古学家们,震惊地发现了,古代伟大名族和文化的遗迹，有些还是大规模，复杂的帝国遗迹,但也有一些就完全从人类记忆中消失了。

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