The scientists say that the current warming could have the same effect on mammals — and could even make humans smaller.

科学家称，当前的全球变暖可能也会对哺乳动物产生同样的影响，甚至可能会让人类的个子也变小。

"Horses started out small, about the size of a small dog like a miniature schnauzer. What's surprising is that after they first appeared, they then became even smaller and then dramatically increased in size, and that exactly corresponds to the global warming event, followed by cooling.

布洛赫博士在《科学》杂志中写道：“马最初的个头很小，和一只小狗的个头差不多，大约也就像一只迷你型雪纳瑞犬那么大。令人惊讶的是，在马诞生后过了一段时间，它们的个子变得更小，之后个头又显著变大，而这些变化与全球变暖和变冷正好是相对应的。

"It had been known that mammals were small during that time and that it was warm, but we hadn't understood that temperature specifically was driving the evolution of body size," Dr Bloch said in the "Science" journal.

“我们已经知道哺乳动物在那个时期个头较小，而那个时期气候也较暖，但我们还未意识到正是温度驱动着身体大小的进化。”

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