poison poison

The elaborate Alnwick Garden in northeast England includes a "Poison Garden" that showcases plants with killer properties. Visitors are invited to look but not touch or even smell. Joanne Silberner for NPR hide caption

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Joanne Silberner for NPR

The skin of the golden poison dart frog, Phyllobates terribilis, secretes a deadly poison that might lead to a better understanding of how to treat malfunctions of the human nervous system. Tambako the Jaguar/Getty Images hide caption

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Tambako the Jaguar/Getty Images

Chemists Re-Create Deadly Frog Poison In The Lab

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Children can encounter lead in contaminated soil, paint, water and dust. Vladimir Popovic/Getty Images hide caption

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Vladimir Popovic/Getty Images

Pediatricians Call For More Testing And Tighter Rules On Lead Exposure

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Rhubarb: delicious with strawberry pie, but steer clear of the leaves. Rae Ellen Bichell/NPR hide caption

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Rae Ellen Bichell/NPR

Keep the soy sauce on your food, and use it in moderation. Aaron Tam/AFP/Getty Images hide caption

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Aaron Tam/AFP/Getty Images

The bean of the castor-oil plant, Ricinus communis, is used in the production of castor vegetable oil and ricin, a poison. Sasha Vasko/via Flickr hide caption

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Sasha Vasko/via Flickr