Why Did Ancient Humans Sleep on Bare Ground?

For almost the entire history of our species, humans slept on bare ground — no mattress, no pillow, just dirt, cold air, and a dying fire — and the strange truth is they may have slept better than you do tonight. This is the hidden story behind the bed: how temperature, firelight, sleeping in a group, the forgotten "first sleep" and "second sleep," and a built-in night watch turned the floor of the world into a sleep system so well-tuned that insomnia barely existed. We pulled out the one piece we liked — the soft surface — and threw away everything around it. So when you jolt awake at 3 a.m. and panic that something's broken, what if your body is simply doing the oldest, most human thing there is? #sleep #sleephistory #ancienthumans #humanevolution #sleepscience #insomnia #anthropology #prehistory #segmentedsleep #firstsleep #secondsleep #huntergatherers #circadianrhythm #evolution #biology #sleepbetter #historyfacts #stoneage #naturalsleep #didyouknow