Imagine yourself 150 years old, pregnant and still going strong. Is this scenario the stuff of science fiction? Scientists predict that in fifty years time every organ in the body, except the brain, will be replaceable. Even the heart can be renovated. The future won't just be a healthier short life. The search for eternal life is now being taken seriously. A number of tantalizing and remarkable discoveries indicating how to stop the human body ageing are about to turn science fiction into reality. The key lies inside every cell in our body. Scientists now believe they will be able to extend the human life span to 150 years. Is this the first step of immortality?