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        6-12

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        Part of How We Got to Now
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        Making the Modern Clock | How We Got to Now: Time

        Understand how Galileo discovered that a pendulum could be used to regulate clocks in this clip from How We Got to Now. Support Materials include a background essay on the history of timekeeping and the development of the atomic clock, teaching tips to foster innovation and bring concepts from this clip into the social studies, science, and math classrooms, as well as pre-viewing and post-viewing discussion questions.

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