http://www.newsweek.com/camels-live-desert-survive-weeks-without-water-biology-genetics-1603416

Scientists have shed new light on how one-humped Arabian camels (Camelus dromedarius) can survive for weeks in the desert without drinking water.

A team led by researchers from the University of Bristol in the United Kingdom investigated the response of the kidneys of these animals when they experienced chronic dehydration and rapid rehydration.