Why do we need calendars and clocks? To survive in this complex society, you need to track what others are doing and when they're doing it. You also need to know what's happening in the natural world. This article discusses how/why humans kept track of time from the Paleolithic Era to today.

Concepts

clocks, hibernation, sundials

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Additional Tags

circadian rhythms, radiometric dating, calendars, khan academy, maya calendars, sundial, precise calendar

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Classroom Considerations

• Knovation Readability Score: 4 (1 low difficulty, 5 high difficulty)
• The intended use for this resource is Instructional