Global warming could make humans shorter, warn scientists who claim to have found evidence that it caused the world's first horses to shrunk nearly 50 million years ago.

科学家警告说，全球变暖可能会使人类变矮。科学家宣称已经找到证据：近5000万年前全球变暖就曾让世界上最早的马个头变小。

In fact, a team from the universities of Florida and Nebraska says it has found a link between the Earth heating up and the size of mammals — horses, in this case, the last time the world heated up.

事实上，来自佛罗里达州和内布拉斯加州的大学的一支研究团队称，他们已经找到地球变暖和哺乳动物个头之间的联系。这一案例中马变矮的现象是上一次全球变暖时发生的。

The scientists used fossils to follow the evolution of horses from their earliest appearance 56 million years ago.

科学家用化石来追溯马从5600万年前诞生至今的进化历程。

As temperatures went up their size went down, and vice versa; at one point they were as small as a house cat, said Dr Jonathan Bloch, curator of the Florida Museum of Natural History, was quoted by the "Daily Mail" as saying.

随着气温的上升，马的个头变小，反之马的个头就变大。《每日邮报》援引佛罗里达自然历史博物馆馆长乔纳森•布洛赫博士的话说，它们曾一度像家猫那么小。

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