Kenyans watch a presentation at the "mobile apps garage showcase" this in Nairobi. Gregory Warner/NPR hide caption

itoggle caption Gregory Warner/NPR

A black dehorned rhinoceros is followed by a calf at the Bona Bona Game Reserve in 2012. South Africa has seen a devastating increase in poaching in recent years as black-market demand for rhino horn has grown. Stephane de Sakutin/AFP/Getty Images hide caption

itoggle caption Stephane de Sakutin/AFP/Getty Images

Planet Money

Can Economics Save The African Rhino?

Poachers kill rhinos for their horns. Some economists think legalizing the horns could save the rhinos.

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Mike Watson (left), CEO of Kenya's Lewa Conservancy, and conservationist Ian Craig identify the carcass of a 4-year-old black rhino named Arthur, whom poachers had killed the night before. The well-armed, well-informed poachers very likely used night vision goggles and a silencer on an AK-47. Gregory Warner/NPR hide caption

itoggle caption Gregory Warner/NPR

Elephants gather at dusk to drink at a watering hole in Kenya. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

Eritrea's President Isaias Afwerki, shown on a visit to Libya in 2010, has been widely criticized by human rights groups. Eritrean exiles have organized passive protests, calling on people to stay home Friday. Geert Vanden Wijngaert/AP hide caption

itoggle caption Geert Vanden Wijngaert/AP

Ugandan soldiers serving with the African Union Mission in Somalia prepare to advance on the central Somali town of Buur-Hakba. Stuart Price/AFP/Getty Images hide caption

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Gen. Bosco Ntaganda addresses a news conference in Kabati, a village located in Congo's North Kivu province, on Jan. 8, 2009. He showed up at the U.S. Embassy in Kigali on Monday and asked to be transferred to The Hague where is wanted on war crimes charges. Abdul Ndemere/Reuters /Landov hide caption

itoggle caption Abdul Ndemere/Reuters /Landov

Kenyan election observers and voters in the mixed slum of Kiambiu — where the first fires started in Nairobi after the disputed presidential election of 2007 — vote in this year's elections. Could something as innocent as the color of the ballots and ballot boxes be contributing to voting "irregularities"? Gregory Warner/NPR hide caption

itoggle caption Gregory Warner/NPR