HOW DID ANCIENT HUMANS SURVIVE THE NIGHT?

The sun goes down, 100,000 years ago. No electricity, no walls, no doors. In a few minutes you can't see your own hand… and somewhere out there, something with very good night vision is getting hungry. So how did ancient humans actually survive the night? In this video: why our earliest ancestors slept in tree nests like chimps, a South African cave where leopards were eating early humans — until fire changed everything, how fire may have made us human, why stories around the campfire mattered, the Hadza study where everyone was asleep at the same time for only 18 minutes, the forgotten "first sleep" and "second sleep", the strange reason you jerk awake as you fall asleep, a 30,000-year-old moon calendar, and why ancient Romans wrote their will before going out to dinner. ⏱ Chapters 0:00 Every night was a survival test 0:44 Sleeping in trees 1:24 The leopard cave 2:19 When did humans get fire? 2:58 Did fire make us human? 3:20 Fire gave us extra hours 3:40 Stories around the fire 4:21 Who stays awake? 4:33 The Hadza: only 18 minutes of total sleep 5:15 First sleep and second sleep 6:03 Why you jerk awake 6:33 The moon: lamp and calendar 7:10 Night in ancient Rome 7:49 What I take from all this Would you survive a night in the Stone Age? And are you an early bird or a night owl — the ancient night guard of your tribe? Tell me in the comments. 📚 Sources Samson, D. R. et al. (2017). Chronotype variation drives night-time sentinel-like behaviour in hunter–gatherers. Proceedings of the Royal Society B. Brain, C. K. (1981). The Hunters or the Hunted? An Introduction to African Cave Taphonomy. University of Chicago Press. (Swartkrans) Berna, F. et al. (2012). Microstratigraphic evidence of in situ fire in the Acheulean strata of Wonderwerk Cave. PNAS. Wrangham, R. (2009). Catching Fire: How Cooking Made Us Human. Basic Books. Wiessner, P. (2014). Embers of society: Firelight talk among the Ju/'hoansi Bushmen. PNAS. Ekirch, A. R. (2005). At Day's Close: Night in Times Past. W. W. Norton. Yetish, G. et al. (2015). Natural sleep and its seasonal variations in three pre-industrial societies. Current Biology. Fruth, B. & Hohmann, G. (1996). Nest building behavior in the great apes. In Great Ape Societies. Cambridge University Press. Coolidge, F. L. & Wynn, T. (2006). The effects of the tree-to-ground sleep transition in the evolution of cognition in early Homo. Before Farming. Marshack, A. (1972). The Roots of Civilization. McGraw-Hill. (Blanchard bone) Juvenal, Satires 3. Nippel, W. (1995). Public Order in Ancient Rome. Cambridge University Press. (vigiles) Some ideas here — like the tree-falling reason for hypnic jerks or the moon calendar bone — are still debated, and I mention that in the video. #history #prehistory #sleep