#Timekeeping #History #ExploreMode
A lot goes on in just 24 hours. But why is a day divided in 24 hours in the first place? Who decided how we would calculate it?

Today, time is tucked away in our pockets, just an unlock button away. It drives our technology, with atomic clocks being responsible for precise GPS location services and speedy internet search results.

Our ancestors, on the other hand, didn’t have it that easy. Time for them was written in the stars, in the sunrise and sunset, in the moon’s waning and waxing.

So how did we go from looking up to celestial bodies to looking down at our phones for time? What other timekeeping methods did ancient humans use before watches and clocks became ubiquitous? And what the heck is an atomic clock?

You’re watching Explore Mode and today, we are diving into time, and how humans developed technologies to measure it.

01:20 Telling time through stars, celestial bodies, and sundials
02:03 Candle clocks and incense clocks / How did candle clocks work?
03:32 Sexagesimal system explained / Why is time divided in the 60s?
04:45 How do waterclocks work? The clepsydra.
06:13 Origin of mechanical clocks
07:06 How do quartz clocks work?
08:17 How do atomic clocks work?

A Brief History of Timekeeping | How Humans Began Telling Time | EXPLORE MODE

Music:
Willow and the Light, Wholesome, Stompdance and Covert Affair
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0/

Medieval Song Village Consort
Always No Copyright Music | Free Music for Everyone

www.youtube.com/watch?v=eZ_r1H9vHkI

Sources:
www.sciencedaily.com/releases/2013/03/130314085052.htm
www.nbcnews.com/science/science-news/ra-romans-used-ancient-egypt-obelisk-sundial-flna2D11826215
blogs.scientificamerican.com/roots-of-unity/the-joy-of-sexagesimal-floating-point-arithmetic/
www.britannica.com/science/sexagesimal-number-system
en.wikipedia.org/wiki/Water_clock
science.howstuffworks.com/environmental/green-tech/sustainable/water-powered-clock1.htm
www.explainthatstuff.com/quartzclockwatch.html
electronics.howstuffworks.com/gadgets/clocks-watches/quartz-watch.htm
science.howstuffworks.com/question40.htm
www.livescience.com/32660-how-does-an-atomic-clock-work.html
www.nature.com/articles/s41586-018-0738-2

Produced by Sofia K.
Edited by Amanda Lee