My green grass snakes were hatched on Aug 2, 1993 in captivity out of wild parents.
One of them had a lump on its spine and died at a fairly young age.
The remaining 4 snakes (1 male and 3 females) lived a long, healthy life.
The male passed in May, 2007 at almost 14 years of age.
Then I lost one of the females and another one a couple of months later
(because of a mouth tumor).
The last sister is still alive and going strong in March, 2010 at 16.5 years of age!