Researchers say the polyphenols in dark chocolate can help the body form more nitric oxide, a compound that causes blood vessels to dilate and blood to flow more easily. iStockphoto hide caption

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Vincent Mourou, co-founder of Vietnam's first artisan chocolate maker Marou, inspects cacao beans at a farmer's garden in Go Cong Tay district. Hoang Dinh Nam/AFP/Getty Images hide caption

itoggle caption Hoang Dinh Nam/AFP/Getty Images

A mathematician's sweet dream: For about $10,000, you can print out rainbow sugar dodecahedrons and interlocking cubes. 3D Systems hide caption

itoggle caption 3D Systems

Ready for a blowout: Blasting the duck with the dryer before roasting dehydrates the flesh so the skin gets firm and crispy. Michaeleen Doucleff/NPR hide caption

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Breakfast of chocolate at Tiffany's? Ten pounds of the dark, sweet stuff were used to craft this Audrey Hepburn-inspired dress and matching handbag, created by master chocolatier Mark Tilling of Squires Kitchen. Photo: Paul Winch-Furness/Courtesy of Salon du Chocolat hide caption

itoggle caption Photo: Paul Winch-Furness/Courtesy of Salon du Chocolat

Would he have won a James Beard? The First Earl of Sandwich probably brought the iced chocolate drink to England from Spain, decades before the recipe appeared in cookbooks. Jan Arkesteijn/Wikimedia.org hide caption

itoggle caption Jan Arkesteijn/Wikimedia.org

You could cut up to half the fat from chocolate without sacrificing taste by infusing it with fruit juice, scientists say. iStockphoto hide caption

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Askinosie buys beans directly from small farmers. The goal: better quality control, and more cash to the growers. Bob Linder/Courtesy of Askinosie Chocolate hide caption

itoggle caption Bob Linder/Courtesy of Askinosie Chocolate

A Swiss cardiologist plots a cheeky graph that shows a country's chocolate consumption may predict its chances of winning a Nobel. John Loo/Flickr.com hide caption

itoggle caption John Loo/Flickr.com