In this paradigm-shifting book from acclaimed Harvard Medical School doctor and one of TIME magazine-s 100 most influential people on earth, Dr. David Sinclair reveals that everything we think we know about ageing is wrong, and shares the surprising, scientifically-proven methods that can help readers live younger, longer.For decades, the medical community has looked to a variety of reasons for why we age, and the consensus is that no one dies of old age; they die of age-related diseases. That''s because ageing is not a disease - it is inevitable.But what if everything you think you know about ageing is wrong?What if ageing is a disease? And that disease is curable.In LIFESPAN, Dr. David Sinclair, one of the world-s foremost authorities on genetics and ageing, argues just that. He has dedicated his life-s work to chasing more than a longer lifespan - he wants to enable people to live longer, healthier, and disease-free well into our hundreds. In this book, he reveals a bold new theory