Answer:
a panted turtle can live up to 20 years in the wild. in some arias of England panted turtles have overpopulated because people had them as pets when teenage mutant ninja turtles were a hit, and after a while the became 'lame' so people decided to let them go in ponds lakes and rivers, because they live so long, not enough were dying, and so they became a problem.
more info. on teenage mutant ninja turtles... http:/enzperiodzwikipediazperiodzorg/wiki/Teenage_Mutant_Ninja_Turtles