The researchers asked fifth graders and college students to create a recovery plan to protect bald eagles from extinction.

研究人员要求五年级学生和大学生制定一个保护秃鹰免于灭绝的恢复计划。

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Millions of Africans may lose a key source of livelihoods as a fifth of freshwater African species are threatened with extinction

南非有五分之一的水生物种濒临灭绝，数百万的南非人可能会丢失一种生存资源的关键来源。

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But with a tenth of all bird species and a fifth of mammals on the verge of extinction, cloning is better than nothing.

ECONOMIST: Endangered species