The appendix has evolved in different animal species at least 29 times, according to this SciShow video, which means it probably serves a function. Scientists who studied appendixes in animals have come to the conclusion that it is a part of the immune system. In humans, the appendix is full of immune cells, including T cells, B cells, and natural killer cells, and good gut bacteria.
Source: https://boingboing.net/2019/10/17/the-appendix-is-not-a-useless.html
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The Article Was Written/Published By: Mark Frauenfelder
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