Stopping elephant poachers

Radioactive residue from the Cold War could provide a valuable tool for stemming the deadly trade in illegal ivory, National Geographic News reports. Poachers killed an estimated 30,000 African elephants last year alone for their tusks—an ongoing slaughter that threatens the long-term survival of the species, whose population numbers about 500,000. Ending poaching has been nearly impossible because it is […]

Read more