Humans have been evolving for millions of years, and as a result, we have a few spare parts. We've got a leftover tailbone from when our ancestors lived in trees, some people have a tiny hole in front of their ears thanks to our ancestors with gills, and we all still have the same muscles monkeys use to move their ears around — except ours don't do anything, aside from entertaining the other kids on the playground. The appendix has long been at the top of that list of obsolete traits, but new research from Midwestern University says your appendix probably has a function after all.
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Written by Ashley Hamer July 4, 2017
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