Old and deep.

Deep under the icy depths live the Greenland sharks, the world’s longest living vertebrates. Until recently, it was impossible to determine just how ancient these animals are but modern technology which involves the use of a lens crystalline in the eye of a fish, have helped determine its age. Some, over 16 feet long, have existed possibly up to over 500 years. How do they live so long? It may be its slow metabolism in the bitter cold. Its said there may be Greenland sharks alive today born before Christopher Columbus.