While elephants born without tusks are not unheard of, they normally comprise just 2 to 6 percent of the herd population. However, that is not the case at Mozambique’s Gorongosa National Park, where an astounding 33 percent of female elephants born after the country’s civil war ended in 1992, are tuskless. While that may appear to be just a coincidence, Joyce Poole, an elephant behavior expert and National Geographic Explorer, has another theory. The researcher thinks we may be witnessing an unnaturally induced evolution of the species due to the incessant poaching of the mammals for their valuable tusks.