About 40,000 years ago, bacteria in the stomachs of Japanese people evolved to digest nori, the seaweed that's used to wrap maki rolls. But the average person from North America doesn't carry this version of the microbe. iStockphoto.com hide caption

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Research News

How Gut Bacteria Evolved To Feast On Sushi

When the first people settled in Japan, they couldn't digest a new food source — seaweed. But not long after, a beautiful microbial relationship began.

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