Palmer amaranth: It's a fast-growing, tractor-busting, herbicide-defying weed. When you read about it in the news these days it sounds like the epitome of evil. But when I first heard of it, I did a double take because amaranth is also a food grain used historically throughout the Americas, by the Hopi in the north all the way down to the Inca in the south. Back in 1977, an article in Science called amaranth "the crop of the future." These days, you can find it on health-store shelves in breads and bars and cereals. OK, so those are different species …
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Nathanael Johnson (@savortooth on Twitter) is Grist's food writer and the author of All Natural: A Skeptic's Quest to Discover If the Natural Approach to Diet, Childbirth, Healing, and the Environment Really Keeps Us Healthier and Happier.
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