Bittersweet nightshade

Solanum dulcamara

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Some species are born invaders, like bittersweet nightshade, a non-native vine with purple flowers and red berries. So what makes it such a successful space invader while other foreign plants never make it? It turns out the answer may be right underfoot. Ecologists Jean Burns and Angela Brandt have devised clever experiments to get to the root of the matter. Ari Daniel Shapiro reports from Cleveland, Ohio.

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Image Credit: Svdmolen, Wikimedia Commons. CC BY-SA 

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