[thfuran]

I'm about the median age in the US and wouldn't expect anyone less than a decade younger than me to have been taught it in school unless they went for a degree in a related field, and possibly not even then. 2015 is after I finished grad school and something like a decade after I'd last taken a class where it might have been taught if it had already been around for enough years to make it into the curriculum.

[robg]

Great points, I got my Ph.D. in neuroscience 20 years ago. There were disparate theories for why we sleep but no mechanistic description. Most of the research not specifically relevant to my own took 10-20 years to become influential. I’d be surprised if most textbooks for neuroscience-related fields being published today are including the glymphatic system, including psychology / psychiatry and medicine.