Summary: Why Do We Age? Scientists answer the question with the latest evolutionary theory of aging, the disposable soma theory, which supports the longevity benefits of calorie restriction. With commentary by leading geroscientist, Tom Kirkwood. [This article first appeared on the website LongevityFacts.com. Author: Brady Hartman. ] The process of aging, or growing old, presents an apparent contradiction to people who believe in Darwin’s… Continue reading "Why Do We Age? The Disposable Soma Theory Answers the Riddle."