I’m surprised that the work on the glymphatic system still isn’t widely known, but pretty clear it solves the why. We sleep because the glymphatic process clean

I’m surprised that the work on the glymphatic system still isn’t widely known, but pretty clear it solves the why. We sleep because the glymphatic process cleans the brain of the damage caused by waking life. https://www.ncbi.nlm.nih.gov/m/pubmed/25947369/ https://www.ncbi.nlm.nih.gov/m/pubmed/25947369/ Seems likely the process is more efficient for some people versus others, just as it’s active during waking life but much less so. Less/more clearance/cleaning is mechanistically explained by the need for less/more sleep.