Soybeans are sprayed in Iowa in 2013. Enlist Duo is a mixture of two chemicals that farmers have used separately for many years: glyphosate (also known as Roundup) and 2,4-D. The new formulation is intended to work hand-in-hand with a new generation of corn and soybean seeds that are genetically engineered to tolerate sprays of both herbicides. Charlie Neibergall/AP hide caption

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The excavation at Ahihud in the Galilee region of Israel where archaeologists found fava beans dating back 10,000 years. Yaron Bibas/Courtesy of Israel Antiquities Authority hide caption

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Chris Nickels for NPR

Peponapis pruinosa is a species of bee in the tribe Eucerini, the long-horned bees. This bee relies on wild and cultivated squashes, pumpkins, gourds and related plants. Wikimedia/USDA hide caption

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