Sir David Attenborough , the beloved natural historian and environmental advocate, is set to mark his 100th birthday next month on 8 May. This extraordinary milestone not only celebrates a seven-decade career that has profoundly shaped our understanding of the natural world but also prompts reflection on the secrets to a long and healthy life. The BBC will commemorate the occasion with a week of special programming , including a new documentary, Making Life on Earth: Attenborough’s Greatest Adventure , offering a behind-the-scenes look at his seminal 1979 series, Life on Earth . While human life expectancy has steadily risen over the past two centuries, reaching a century remains a remarkable achievement, sparking widespread curiosity about the factors contributing to such longevity.…