The question of what underlies memory development is yet to be fully answered. Children's level of knowledge and abilities that may impact on memory are important, but the neural maturation of the brain and other biological factors are also critical. ‘The seven ages of man’ examines how memory capacity changes as we age and whether there are any scientifically established memory changes that can be identified as a consequence of ageing. There is evidence that age-related memory loss comes partly from a reduction in cognitive processing speed. One area of interest is whether the changes in memory due to 'normal’ ageing are necessarily signs of further decline in brain capacity.