Now, again, there's a great debate about when the Clovis people first arrived in the Americas.

现在，关于克洛维斯人是什么时候第一次来到美洲又有了一个很大的争论。

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Since the Clovis people were highly mobile, it's plausible that they would set up spots along established travel routes where they keep a variety of items.

由于克洛维斯人流动性很强，他们可能会在既定的旅行路线上设立站点，在那里存放各种物品。

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But then at other Clovis sites, there's also a lot of evidence that the Clovis people mostly gather plants and hunted small game, like rabbits and wild turkeys.

但在其他克洛维斯人的遗址，也有很多证据表明克洛维斯人主要采集植物和狩猎小型猎物，比如兔子和野火鸡。

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Some scientists believe that the Clovis people died off because they killed too many native animals.

VOA: special.2009.01.20

Others say climate change caused the Clovis people and the animals to die.

VOA: special.2009.01.20

But Dr Kennett notes that present-day bison are not like the ones the Clovis people hunted.

ECONOMIST: Mass extinctions

Of course, that might just mean that the Clovis people had not quite exterminated bison before they, themselves, disappeared.

ECONOMIST: Mass extinctions

One is to look for evidence of population bottlenecks in other species, especially animals that were not hunted by the Clovis people.

ECONOMIST: Mass extinctions