Extinct Butterfly Returns?

By: CBS

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Uploaded on August 21, 2012 by CBS

A type of California butterfly was deemed to be extinct, but step-by-step they're coming back from the brink. As Ben Tracy reports, scientists are letting nature take its course.

Tags:
Cbsepisode, CBS, Evening, News, Extinct, Butterflies, Insects, Returns, Blue, California, Nature, Step, By, Ben Tracy, CBS Evening News, Entertainment

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