When Hehemann tested some of the genes from this bacterium, he found that, as expected, this bacterium made special enzymes to break down nori.
当 Hehemann 测试这种细菌的一些基因时，他发现，正如所料，这种细菌生产特殊的酶来分解紫菜。
The team immediately realized what must have happened, Hehemann says.
该小组立即意识到4万年前发生了什么事。
Not surprisingly, nearly all the bacteria the researchers found live in the ocean, Hehemann says.
黑埃曼说，毫不奇怪，研究人员发现，几乎所有在海洋中生活的细菌都有这种基因。
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