One group eventually crossed the Bering Land Bridge to Asia where, following an evolutionary path that's only sketchily understood, it became the two-humped Bactrian camel and the one-humped dromedary .
Camels, both the one-humped Arabian or dromedary and the two-humped Bactrian variety, have been used to support campaigns in desert areas from biblical times onwards.
Some think that today's one-humped dromedary also derived from this two-humped camel ancestor.
Alligators eat you, bees sting, crabs pinch, riding a dromedary makes you dizzy.
Both species have a long gestation period: the dromedary 12-13 months and the Bactrian 13-14 months.
The one-humped Arabian camel is also known as the dromedary .
One, found in northern Africa and central Asia, consists of the dromedary (one-humped camel) and bactrian camels (two-humped camel).
‘It was not known that the dromedary was present in the Middle East more than 10,000 years ago,’ he said.
Of particular significance to ancient Arabia was the domestication of the dromedary (one-humped camel) in the southern part of the peninsula between 3000 and 2500 B.C.E.
The finds suggest that the massive dromedary - or single-humped camel - was hunted by prehistoric people, the researchers add.