Conservationists have developed a new high-tech strategy to trace the cartels that smuggle much of the illegal ivory around the world — by using DNA to track ivory back to specific ports.
Biologist Samuel Wasser from the University of Washington is behind the effort. He notes that while poaching in Africa has dipped recently, too many elephants are still dying.
"Right now we're estimating that there are about 40,000 elephants being killed every year," he says, "and there are only 400,000 left in Africa. So that's a tenth of the population a year."