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'You may have heard that the appendix is a relic of our past, like the hind leg bones of a whale. Bill Parker, a professor of surgery at the Duke University School of Medicine, heard that, too; he just disagrees.
Parker thinks the appendix serves as a "nature reserve" for beneficial bacteria in our gut. When we get a severe gut infection such as cholera (which happened often during much of our history and is common in many regions even today), the beneficial bacteria in our gut are depleted. The appendix allows them to be restored. In essence, Parker sees the appendix as a sanctuary for our tiny mutualist friends, a place where there is always room at the inn.'
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