Monarch butterflies

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At the Joya Redonda Monarch Butterfly Sanctuary, hibernating monarch numbers have multiplied tenfold. But is that enough to save the insect?

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Each spring, millions of Monarch butterflies migrate from Mexico north to the US. New research suggests that temperature plays a large role in signaling the butterflies to get moving. University of Massachusetts Medical School professor, Steven Reppert, tells host Steve Curwood that in the future, climate change could disrupt monarch migration.