A black rhino and a giraffe stop for a drink in Namibia's Etosha National Park. Only about 5,000 black rhinos remain in the world. Frans Lanting/DPA/Landov hide caption toggle caption Frans Lanting/DPA/Landov Opinion 13.7: Cosmos And Culture Why We Need Compassionate Conservation January 13, 2014 A permit to kill an endangered black rhino in Africa sold for $350,000 at auction. Commentator Barbara J. King says we should look for ways other than charity hunts to support wildlife conservation.