“Scientists disagree about when humans first tasted kale. But it is known that the ancient Greeks cultivated leafy greens, which they boiled and ate as a cure for drunkenness. And early Roman manuscripts include references to “brassica,” a word that encompassed wild turnips, cabbages and kalelike plants. By the Middle Ages, kale had spread through Europe and Asia. The Italians developed plants with “dinosaur” scales, while the Scots created varietals with leaves like frilly petticoats. The Russians produced kale that could survive in the snow.”

– http://www.nytimes.com/2013/10/20/magazine/who-made-that-kale.html?ref=todayspaper