因此，虽然之前DNA乘地球之外的物体来到地球的想法被提及过，但是这是我们首次呈现出真实的证据支持这一概念。

So while the idea of DNA riding aboard extraterrestrial objects has been floated before, this is the first time we've been presented real evidence backing that notion.

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支持者： 月面尘土的尺寸和形状与沙子完全不同，因此并不需要潮湿就可以留下被压出的痕迹。 地球上也有许多这样的粉末状物体。

Sceptic : A third person would have had to be there with a camera to take photographs of astronauts arriving on the moon and blasting off again.

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