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Humans have always felt the need to measure time, even before the invention of clocks, calendars and other instruments. In ancient times, men marked the days by observing the Sun, but when the distinction between light and dark was no longer sufficient, the first sundials began to appear in Egypt, then the hourglasses with water and sand, until arriving at clocks. In this video we will travel through time to discover how humans measured the passage of days, hours and minutes in the past and how these instruments have evolved over the course of history. 00:00 How did the ancients mark time? Measuring instruments 00:44 Homo sapiens: time measured by the apparent motion of the Sun 01:20 The Neolithic agricultural revolution and the invention of calendars 02:16 The calendar of the ancient Egyptians 02:50 The birth of the week in Mesopotamia 03:12 The oldest instrument: a sundial from ancient Egypt from 1500 BC 03:50 Water hourglasses from 1390-1350 BC 04:43 The division of time into days, months and hours 07:00 The Julian calendar from the 1st century BC BC 07:50 Sand hourglasses 08:50 The invention of clocks on bell towers and towers 09:27 The Gregorian calendar of 1582 AD 10:32 The clock and the industrial revolution 11:19 Clocks today OUR RECOMMENDED VIDEOS: • How to set the time of t... • The true story of the Mona Lisa by Le... SOURCES ZDF José-Manuel Benito Alvarez Ignazio Danti NicolaCC #geopop #time #science