Articles by Warren Cornwall, Slate

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The Missing Monarch Butterflies and Monsanto’s Roundup
Warren Cornwall, Slate – TRANSCEND Media Service, 3 Feb 2014

The butterfly’s life cycle is exquisitely synchronized to the seasonal growth of milkweed, the only plant its larvae will eat. In a game of hopscotch, successive generations of monarchs follow the springtime emergence of milkweed from Mexico as far north as Canada.

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