Empty shelves where eggs should be at a Whole Foods Market in Washington, D.C. The store blames increased demand for organic eggs. Dan Charles/NPR hide caption

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Cattle graze at a Brazilian Agricultural Research experimental farm in Planaltina in Goias state. To reduce emissions from deforestation, the Brazilian government is experimenting with grazing on integrated forest and pasture lands. Evaristo Sa/AFP/Getty Images hide caption

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The Trader Joe's Peanut Butter Filled Pretzel: The salty-sweet snack that launched a bitter lawsuit. Courtesy of Tina Haupert hide caption

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A screen grab from an undercover video released by the Humane Society of the U.S. shows a pig in a gestation crate at Iron Maiden Farms in Owensboro, Ky. Courtesy of The Humane Society of The United States hide caption

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Beware of the big guys: Red snappers from tropical waters sometimes accumulate high levels of the toxin that causes ciguatera. Go for the smaller fish to avoid it. Kamel Adjenef/iStockphoto hide caption

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Peter Frenette of the United States jumps during training for the Men's Normal Hill Individual ahead of the start of the Sochi Games. Lars Baron/Getty Images hide caption

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A customer shops for milk at a Safeway in Livermore, Calif. Although it may seem counterintuitive, there's growing evidence that full-fat dairy is linked to reduced body weight. Justin Sullivan/Getty Images hide caption

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A Denny's waitress delivers breakfast to customers in Emeryville, Calif. The tipped minimum wage has been stuck at $2.13 since 1991. Justin Sullivan/Getty Images hide caption

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Research in mice offers new clues as to why Harold and Kumar were so motivated to get to White Castle. Todd Plitt/Getty Images hide caption

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Euclid Market, a corner store in East Los Angeles, recently got a makeover to promote healthier eating. It not only sells more fruits and vegetables, but also offers cooking classes and nutrition education. Courtesy of Margaret Molloy/UCLA Fielding School of Public Health hide caption

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A woman shops at a supermarket in New York City. Spencer Platt/Getty Images hide caption

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