There are plenty of things about the way the brain works that remain a mystery to us
. Where does a memory live? Do we actually have free will? Why do I sometimes worry that I've lost my phone because it's not in my pocket even though it is clearly in my hand? While science doesn't have answers to any of those questions yet, researchers have weighed in on a long-standing mystery of neuroscience, shedding light on how the brain disposes of waste and keeps itself clean
. In doing so, they've discovered a whole new plumbing system
that seems to shadow the arteries and blood vessels in the organ.