SteveThompson, "This Is What Your Brain Does When You’re Not Doing Anything"
https://www.wired.com/story/what-your-brain-is-doing-when-youre-not-doing-anything/
"When your mind is wandering, your brain’s 'default mode' network is active. Its discovery 20 years ago inspired a raft of research into networks of brain regions and how they interact with each other."