TED-Ed

Emma Bryce: What is a calorie? (2015x80)

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We hear about calories all the time: How many calories are in this cookie? How many are burned by doing 100 jumping jacks, or long-distance running, or fidgeting? But what is a calorie, really? And how many of them do we actually need? Emma Bryce explains how a few different factors should go into determining the recommended amount for each person. [Directed by Qa'ed Mai, narrated by Addison Anderson].