US federal wildlife officials have suggested 23 species be declared extinct. Why are so many going extinct now? And if we can’t save all endangered species, how do we choose which species to focus on? Conservation scientist Gwen Iacona explains - she's a Research Professor of the School of Life Sciences at Arizona State University and the Conservation Investment Program Lead for the Center for Biodiversity Outcomes. (Segment Produced by Aubrey Johnson)
Show More...