AGING

Aging (American English) or ageing (British English) is the accumulation of changes in an organism or object over time. Ageing in humans refers to a   multidimensional process of physical, psychological, and social change.      Some dimensions of ageing grow and expand over time, while others         decline. Reaction time, for example, may slow with age, while knowledge   of world events and wisdom may expand. Research shows that even late in life potential exists for physical, mental, and social growth and                 development. Ageing is an important part of all human societies reflecting  the biological changes that occur, but also reflecting cultural and societal   conventions. Age is usually measured in full years — and months for young children