Cold War Radioactivity Can Date Illegal Elephant Ivory New application of known technique may allow countries to track illegal sales. By Roff Smith, for National Geographic PUBLISHED July 01, 2013 0 A strong room underneath the Kenya Wildlife Service headquarters holds confiscated ivory. Photograph by Brent Stirton, Getty Images/National Geographic Fallout from long-ago Cold War explosions is now a forensic tool in the very modern war against elephant poachers and the illegal trade in ivory. Related Stories Photos Show Sad Plight for African Elephants Lifted to China Is the Worst of Tanzania’s Elephant Crisis Over? Can Killing More Elephants Actually Help to Save Them?