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When I signed into
Facebook this morning I was greeted by a notice that on this day in 1883 the railroad industry in North America began using the four timezones that are still in use today. Upon reading that notice I immediately remembered a TED-Ed lesson on the topic. Where did timezones come from? What is "standard time?" The answers to those questions and more can be found in the short TED-Ed lesson
How Did Trains Standardize Timezones in the United States? Watch the video below.
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