De-Extinction Science: Coming To A Future Near You
A growing number of scientists worldwide are working on projects to bring back to life animals like the wooly mammoth and the passenger pigeon.
But is the revival of extinct species a good thing for humanity? Or for the planet? We get into the science and the controversy of de-extinction with Nathaniel Rich, the writer behind The New York Times Magazine's cover story, The Mammoth Cometh. Original air date 03/13/14