Rice is just as nice as ice when it comes to bucket challenges. Right: Manju Latha Kalanidhi, creator of the Rice Bucket Challenge, gives grains to a hard-working neighbor. Courtesy of Manju Latha Kalanidhi hide caption

itoggle caption Courtesy of Manju Latha Kalanidhi

Wheat fields like this one could yield wheat with less zinc and iron in the future if they are exposed to higher levels of CO2, according to the journal Nature. Zaharov Evgeniy/iStockphoto.com hide caption

itoggle caption Zaharov Evgeniy/iStockphoto.com

Melanie Vanderlipe Ramil with her grandmother, who taught her to make the Filipino dish lumpia, in 2009. Courtesy of Melanie Vanderlipe Ramil hide caption

itoggle caption Courtesy of Melanie Vanderlipe Ramil

Rice farmers in Indonesia plant rice seedlings using the "system of rice intensification." Courtesy of SRI International Network and Resources Center hide caption

itoggle caption Courtesy of SRI International Network and Resources Center

After coloring, styling and photographing the rice, chef and food stylist Caitlin Levin made coconut rice. "It taste the same," she says. Henry Hargreaves hide caption

itoggle caption Henry Hargreaves

Rice farmers in Thailand, the world's leading rice exporter, harvest their crop in 2008. When the rice crisis hit, Thai government officials started talking about setting up a cartel of rice exporters, similar to OPEC. David Longstreath/AP hide caption

itoggle caption David Longstreath/AP