What does the appendix do? Biologists explain the complicated evolution of this inconvenient organ

The appendix has independently evolved at least 32 times across 361 mammalian species. What makes it an evolutionary darling ...
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Your appendix is not, in fact, useless. This anatomy professor explains

It was the first day of spring break in 1992 in Phoenix, and 12-year-old Heather Smith was excited for her family's upcoming ski trip. But before Smith and her family had even packed their snow pants, ...