How Science Looks on Instagram: "The candle clock is a fascinating historical invention that shows how humans measured time long before the age of digital watches or mechanical clocks. Used in ancient China, Japan, the Middle East, and medieval Europe, the candle clock was a simple yet ingenious device: a tall candle was marked with evenly spaced lines down its length, and as the candle burned at a steady rate, the passage of time could be measured by how far the wax melted past each mark. Some

History Decoded on Instagram: "Long before digital clocks existed, humans used fire to track time. A candle burns at a nearly constant rate when the wax, wick, and airflow remain stable. As the candle shortens, equal amounts of wax melt over equal intervals of time. By marking the candle or placing objects at specific heights, people could measure the passing of minutes and hours. one of This principle is called a candle clock the earliest timekeeping methods, powered purely by physics, heat tra