The antibiotic-free pigs roam freely on Niman Ranch in Iowa. Sarah Willis/courtesy Niman Ranch hide caption

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A Tokyo sushi restaurant displays blocks of fat meat tuna cut out from a 269kg bluefin tuna. Yoshikazu Tsuno/AFP/Getty Images hide caption

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Lobster boats in Maine have been pulling up soft-shell lobsters strangely early in the season. Robert F. Bukaty/AP hide caption

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Food science guy Alton Brown says the last thing you want to see is flames touching food on the grill. iStockphoto.com hide caption

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