the

9806 篇文章
Mammals that adapted well to the cold dominated these frigid lands...
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Mammals that adapted well to the cold dominated these frigid lands... 适应了寒冷的哺乳动物 主宰着这冰雪天地

the tundra-steppe became Earth's most extensive habitat.
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the tundra-steppe became Earth's most extensive habitat. 冻原成为地球上最广阔的栖息地

Circling almost the entire Northern Hemisphere,
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Circling almost the entire Northern Hemisphere, 围绕几乎整个北半球

But south of the ice sheets,
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But south of the ice sheets, 但是在冰层以南

snow blanketed the north of the globe...
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snow blanketed the north of the globe... 白雪覆盖了地球北部

But together, snowflakes changed the world.
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But together, snowflakes changed the world. 但是雪花聚在一起 改变了世界

No two the same.
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No two the same. 没有两片雪花完全相同

...and it started with the tiniest of things.
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...and it started with the tiniest of things. 从最细微之处开始变化

led to an abrupt cooling of the planet.
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led to an abrupt cooling of the planet. 导致地球温度骤降

changes in the Earth's orbit, ocean currents, and carbon dioxide levels
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changes in the Earth's orbit, ocean currents, and carbon dioxide levels 地球轨道、洋流 和二氧化碳水平的变化