Sweet potato evangelist Maria Isabel Andrade drives around Mozambique in her orange Toyota Land Cruiser in 2012. She is one of four researchers honored with the World Food Prize for promoting the crop to combat malnutrition. Dan Charles/NPR hide caption

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Workers sort potatoes in the field, collecting small and large ones in different buckets. Each bucket weighs 30 pounds or so. A worker will shoulder that bucket and dump it into a flatbed truck 400 to 500 times a day. It's a daily load of 6 or 7 tons of sweet potatoes. Dan Charles/NPR hide caption

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Behind Your Holiday Sweet Potato Dish, Hard Work In The Fields

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Now that's a big root: Sweet potatoes aren't tubers, or thickened stems, like potatoes. Sweet potatoes are roots — swollen and packed with starch. U-ichiro Murakami/Flickr.com hide caption

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NPR producer Olly Dearden is a fan of most classic Thanksgiving dishes, but calls sweet potatoes topped with marshmallows a "culinary abomination." Stephen Little/Flickr hide caption

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Marshmallows On Sweet Potatoes? Thanksgiving's Traditions Exposed

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A well-traveled root: A vendor sells sweet potatoes at a market near Manila in 2011. The Portuguese brought the root to the Philippines all the way from the Caribbean. Ted Aljibe/AFP/Getty Images hide caption

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Sweet potato evangelist Maria Isabel Andrade from the International Potato Center drives around Mozambique in her orange Toyota Land Cruiser. Dan Charles/NPR hide caption

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Saving Lives In Africa With The Humble Sweet Potato

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