Today just three species of elephant survive — but they are the last twigs on a vast, 60-million-year family tree. Their ancestors began as rabbit-sized swamp-dwellers in North Africa and radiated into some of the largest land mammals that ever lived: shovel-tuskers, four-tuskers, woolly mammoths and elephants twice the weight of any alive today. Here’s the full story of how the elephant evolved, and the extinct relatives it left behind.
The short answer: elephants belong to the order Proboscidea, which arose in Africa around 60 million years ago. The earliest known member, Eritherium, was a rabbit-sized animal with no trunk. Over time the group evolved trunks and tusks and spread worldwide as mastodons, mammoths and true elephants — but only Loxodonta (African) and Elephas (Asian) survive today.