What is the simplest definition of aging?
Aging is a constant decrease in the capacity to do things, both physically and mentally, and a constant increase in age-related diseases. Just look at the average young person – full of energy, capable to move mountains and earn PhD s. Then look at the average elderly person: Fragile, frequently walks with a cane or saddled in a wheelchair, and burdened with a confused mind. They sometimes do not remember the most basic things like finding their way home from the local supermarket. It doesn t have to be that way! Scientific definitions of aging Until recently, there were many different theories on aging. Several of them have died of old age and others have grown stronger based on research. The theories that gained support by confirming postulated causes of aging are discussed in Part I. Average life span increases of nearly 100% have resulted by combining the key factors from each theory on aging and applying them in longevity studies on cancer-prone animals. Scientific data from human
