Ivory poaching has led to evolution of tuskless elephants, study finds

Researchers say findings in Mozambique demonstrate impact of human interference in nature

Ivory poaching over decades has led to the evolution of tuskless elephants, researchers have found, proving that humans are literally changing the anatomy" of wild animals.

A previously rare genetic mutation causing tusklessness has become very common in some groups of African elephants after a period in which many were killed for their tusks, according to a study published in the journal Science.