I want to be forever young
Mortality equation offers a theory for programmed aging
Ageing is thought to be a consequence of intrinsic breakdowns in how genetic information is processed. But mounting evidence suggests it can be slowed. To help resolve this mystery, we derive a mortality equation that governs the dynamics of an evolving population with a given maximum age. We prove that, in a fixed environment, programmed ageing cannot confer a long-term benefit, but it may do so in a changing one.