I wrote my PhD thesis about bacterial flagella. Not about the motor though (which is incredible), but about the long part of the flagella that is extracellular. It is able to change its shape as the bacteria moves. The mechanism by which this happens is at the same time quite simple, but just about impossible to explain via text. Really, really neat bit of evolution that has proven to be home to incredibly rich physics that is still being studied to this day.
Also, this is neither here nor there, but I have been trying out piefed lately and it’s pretty cool. Thanks to the devs over there, the anime community should be a lot more compatible with piefed going forward thanks to squashing a couple bugs I found from our use cases. Specifically, piefed users should now enjoy: