How Did Ancient Humans Know What Time It Was?

How did ancient humans know what time it was before clocks even existed? Long before wristwatches, smartphones, or mechanical clocks, ancient civilizations had already found incredible ways to measure time. From Egyptian sundials and shadow clocks to water clocks and the stars above, humans developed surprisingly accurate methods to organize their lives thousands of years ago. In this documentary, we'll explore the fascinating history of ancient timekeeping, including Michel Siffre's famous cave experiment, the human body's internal clock, Egyptian shadow clocks, water clocks, decan stars, and how early civilizations tracked the passing of hours without modern technology. If you enjoy documentaries about ancient history, archaeology, anthropology, human evolution, and forgotten civilizations, this video is for you. Watch until the end to discover why the very first clock was never made of stone, water, or bronze. 👍 Like the video if you learned something new. 💬 Comment: Which ancient invention surprised you the most? 🔔 Subscribe for more documentaries about ancient humans, forgotten history, survival, science, and the mysteries of our past. #AncientHistory #History #AncientHumans #Documentary #AncientEgypt #Archaeology #HumanEvolution #HistoryFacts #Science #Educational