Introduction
For eons, people have longed to end disease, suffering and death—or at least to live a lifespan that’s long, healthy, and meaningful. In the past 30 years, this yearning has manifested in a scientific quest to understand the deep mechanisms of why organisms age, including humans, which has shifted from wishful thinking to becoming more mainstream. What is the latest science in the field of longevity, anti-aging, and living a healthy life, and where is it heading? What is legitimate science, and what is not? What are the ethical considerations if lifespans are radically increased?