These Are the Longest Living Animals in the World

As medical science progresses, us humans, as a race, find ourselves living longer and longer lives.
But while we have medicine and the all the benefits of modern living to help us expand our lifespans, there are still several species of wild animals that outdo us, living for almost impossibly long periods, despite being susceptible to the pressures of sickness and predation.
Who are these animals? How long to they live, and which one lives the longest?
Most importantly - are there immortal animals living in the world today? And could they help us become immortal one day, too?
These Are the Longest Living Animals in the World