As Threats to Biodiversity Grow, Can We Save World’s Species?

Yale Environment 360: Throughout much of the Pleistocene era, which began 2.5 million years ago, many of the world's large mammals survived periods of glaciation and deglaciation by moving across a landscape devoid of humans. Then as the Pleistocene drew to a close at the end of the last Ice Age -- some 20,000 to 12,000 years ago -- creatures such as the wooly mammoth had to confront not only shrinking habitat caused by climate change. They also faced thousands of humans with stone-tipped weapons, a one-two punch that...

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