Oh I totally geek out on biomedical engineering and related fields. One of the things I’m absolutely fascinated by is how little is known or understood about how cerebrospinal fluid works. There just haven’t been good ways to study it in action. We know it’s essential. A lot of information is missing about exactly why or how it works. 

 That does sound fascinating! Going to have to research that now. I was quite into the structure of articular cartilage and implants/joint replacement tech as well as cell-material interfacing/bonding but alas went down an entirely different path. Still try and read about it when I can though.