A salamander swims in an aquarium at Mexico City's National Autonomous University of Mexico (UNAM ) laboratory June 10, 2009. Scientists are genetically modifying a bizarre looking Mexican salamander, which according to ancient mythology is a transformed Aztec god, in the hope its ability to regenerate body parts will one day help human amputees. Also known as "water monsters," the half-foot-long (15-cm-long) axolotl is nearly extinct in its only remaining habitat: the polluted vestiges of Aztec canals that snake though southern Mexico City, packed with colourful boats carrying tourists and mariachi musicians. Picture taken June 10, 2009. REUTERS/Felipe Leon (MEXICO HEALTH SCI TECH)
REUTERS/STRINGER/MEXICO