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    How Scientists Are Reviving San Francisco’s Extinct Blue Butterfly

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How Scientists Are Reviving San Francisco’s Extinct Blue Butterfly

02:56

The California Academy of Sciences is leading an effort to bring back the Xerces blue butterfly, which went extinct around 1941 because of human development in San Francisco. Researchers are hoping to reintroduce silvery blue cousins to the ecosystem to act as crucial pollinators and restart the butterfly population. NBC’s Gadi Schwartz reports in this week’s Sunday Spotlight.