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  3. Global warming could make humans shorter, warn scientists who claim to have found evidence that itcaused the world’s first horse

Global warming could make humans shorter, warn scientists who claim to have found evidence that itcaused the world’s first horse

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问题     Global warming could make humans shorter, warn scientists who claim to have found evidence that itcaused the world’s first horses to【B1】______ nearly 50 million years ago. In fact, a team from theuniversities of Florida and Nebraska says it has found a【B2】______ between the Earth heating up and thesize of mammals—horses, in this case, the last time the world heated up. The scientists used【B3】______tofollow the evolution of horses from their earliest appearance 56 million years ago. As temperatures went up,their size【B4】______, and vice versa: at one point they were as small as a house cat, said Dr. Jonathan Bloch,curator(管理者)of the Florida Museum of Natural History,【B5】______by the Daily Mail as saying. Thescientists say that the【B6】______warming could have the same effect on mammals—and could even makehumans smaller. "Horses【B7】______small, about the size of a small dog like a【B8】______schnauzer(髯狗). What’s surprising is that after they first appeared, they then became even smaller and then dramaticallyincreased in size, and that exactly【B9】______ the global warming event, followed by cooling. "It had beenknown that mammals were small during that time and that it was warm, but we hadn’t understood that temperature specifically was【B10】______the evolution of body size," Dr. Bloch said in the Science journal.
【B5】
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