Support WBURHow Gut Bacteria Evolved To Feast On SushiPlay03:52Download AudioJon HamiltonApril 07, 2010 ShareAbout 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)
