Competitive eaters down their frankfurters during the 2010 Nathan's Famous Fourth of July International Hot Dog Eating Contest at the original Nathan's Famous on Coney Island. Michael Nagle/Getty Images hide caption

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Original varieties of tomatoes from South America are believed to have been small, like today's cherry tomatoes. Today's large, plump tomatoes are the result of years of selection. Sean Gallup/Getty Images hide caption

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The green bean salad with snow peas, coriander and mustard seeds and tarragon, from Yotam Ottolenghi's Plenty. Ottolenghi's column, "The New Vegetarian," has run in London's Guardian newspaper since 2006. Jonathan Lovekin hide caption

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Robert Laws collects supplies from the Tennessee food bank's mobile pantry. Pam Fessler hide caption

itoggle caption Pam Fessler

Steven White (right) helps serve dinner at the Salvation Army soup kitchen. Pam Fessler/NPR hide caption

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The small print in the bar at the top of the Corn Pops box is an example of industry's voluntary approach to enhanced nutrition information. Marina Dominguez/NPR hide caption

itoggle caption Marina Dominguez/NPR