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A duck-billed dinosaur skeleton, which the researchers think ate crustaceans, on display in 2009 at the Venetian Resort Hotel Casino in Las Vegas, Nevada. Ethan Miller/Getty Images hide caption

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Ethan Miller/Getty Images

Indian female farmers sow paddy in a field during monsoon season near Allahabad on July 19, 2014. The monsoon rains, which usually hit India from June to September, are crucial for farmers whose crops feed hundreds of millions of people. Sanjay Kanojia/AFP/Getty Images hide caption

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Sanjay Kanojia/AFP/Getty Images