The Body Runs on a Battery — and Aging Is the Internal Resistance Climbing (opens in new tab)

A team in Tel Aviv proposes that lifespan is not set by how fast you burn energy but by how much spare metabolic “current” you carry and how slowly your mitochondrial wiring corrodes. A single three-variable equation built on this idea — body size, mitochondrial DNA composition, and body temperature — predicts about 69% of why some mammals live 100 times longer than others. Why does a shrew live two years and a bowhead whale over two centuries, when both run on essentially the same genes and ...