How we measured time before watches and smartphones: a journey from homo sapiens to today
Humans have always felt the need to measure time, even before the invention of clocks, calendars and other instruments. In ancient times humans marked out the days by observing the Sun, but when the distinction between light and dark was no longer enough, the first sundials began to appear in Egypt, then water and sand hourglasses, and finally clocks. In this video we will travel through time to find out how humans measured the passage of days, hours and minutes in the past and how these instruments have evolved throughout history.
00:00 How did ancient people mark time? The tools of measurement
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 The water hourglasses of 1390-1350 BC.
04:43 The division of time into days, months and hours
07:00 The Julian calendar of the 1st century B.C.
07:50 The sand hourglasses
08:50 The invention of clocks on steeples and towers
09:27 The Gregorian calendar of 1582 A.D.
10:32 The clock and the industrial revolution
11:19 Clocks today
CREDIT
ZDF
José-Manuel Benito Alvarez
Ignazio Danti
NicolaCC
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