Methusaleh: The oldest tree in the world | What's the mystery of trees' immortality?

No one can beat trees at living long. Methusaleh, the single oldest living tree, that we've discovered, is over 4,800 years old. On the other hand, Pando is a colony of quaking aspen trees all born from the same over 70,000 year old root system. These trees and many others manage to live long because they can regrow lost parts like a branch or root, their stem cells always divide, and they can simply stop growing them the going gets rough. Some researchers say that with these traits, they might as well be immortal. But, as yet, we have no conclusive evidence of that an no way of getting that evidence.