Are you immortal if you never age? Defying death is not as clear-cut as it might initially seem. What we define as immortality depends a bit on what you think it means to die.

Ying Zheng, called himself as the first emperor of China - A dictator with ruthless system wanted to conquer all states. In search of becoming immortal, one day he collapsed at an early age, sooner led to fall of his dynasty.

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...