Species have been evolving since the beginning of time, but the current rate of extinction is at the highest level since dinosaurs died off 65-million years ago. Acting Director of the Smithsonian Zoo Steve Monfort joins CBSN to discuss whether we've reached a tipping point.
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Species have been evolving since the beginning of time, but the current rate of extinction is at the highest level since dinosaurs died off 65-million years ago. Acting Director of the Smithsonian Zoo Steve Monfort joins CBSN to discuss whether we've reached a tipping point.