plant science plant science

Okra slime changes when its pH changes. To make okra less slimy, says botanist Katherine Preston, cook it with an acid, which changes the properties of the molecules in the mucilage and renders it far less viscous. Southerners cook okra with tomatoes, which provide plenty of acid. Mary Mathis/NPR hide caption

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Mary Mathis/NPR

Thomas Jefferson's garden at Monticello served as an experimental laboratory for garden vegetables from around the world. Leonard Phillips/Thomas Jefferson Foundation at Monticello hide caption

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Leonard Phillips/Thomas Jefferson Foundation at Monticello

Thomas Jefferson's Vegetable Garden: A Thing Of Beauty And Science

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