Although it is common knowledge that the human body contains multitudes of bacteria (in fact, a human body contains more bacterial cells than human cells), we like to think of these friendly bacteria as residing peacefully in our gut—carrying out their end of a symbiotic relationship by aiding in the digestion of food, as well as producing chemicals that help us squeeze every last drop of energy out of what we consume. Just within the last decade, several new forms of life have been discovered at the bottom of the Dead Sea—bacterial life that has become accustomed to both extreme salinity and fresh water (a necessary prerequisite for living in the Dead Sea, since the salinity of the water fluctuates so rapidly).