Mystery Class Home
Sunlight and the Seasons
Telling Time with Sundials
Imagine how ancient people, who had no clocks, kept track of time! Early on, they surely noticed that light was followed by darkness, which was followed by light, and so on. Later, humans noticed that the length of shadows (cast by trees and other objects) changed during the day.

Photo: Don@Damoc

Journey North Home Page   Facebook Pinterest Twitter   Annenberg Media Home Page
Copyright 1997-2017 Journey North. All Rights Reserved.   Contact Us    Search