Learn about artificial selection in this clip from Gorongosa Park: Rebirth of Paradise. Elephant Researcher Joyce Poole explores a rare genetic mutation that has become all to prevalent in Gorongosa's elephants. The civil war in Mozambique didn't just shape elephants' behavior, it shaped their bodies. As the conflict spread through the park, soldiers killed elephants for their tusks. The ivory would be used to buy guns and supplies and feed hungry troops. The female elephants that survived were mostly tuskless and now those females are producing tuskless daughters.