By Robin Holliday
For hundreds of years humans were wondered by means of the inevitability of human getting older. for many of the second one 1/2 the 20th century getting older remained a secret, or an unsolved organic challenge. on the finish of the twentieth century a extraordinary medical discovery emerged. It was once no longer a unmarried discovery within the traditional feel, since it was once in response to a sequence of significant interconnected insights over rather an extended time period. those insights made it attainable for the first actual time to appreciate the organic purposes for getting older in animals and guy. it could actually already be stated, notwithstanding, that the numerous observations and insights that specify getting older aren't authorised as tested wisdom for a very long time. the sphere remains to be jam-packed with scientists, and non-scientists, who're simply chuffed to head on speculating concerning the 'mystery' of getting older. the purpose of this publication is to dispel lack of understanding by way of explaining in non-technical language what are the explanations for getting older and the parable of over the top prolongation of existence.
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Additional resources for Aging: The Paradox of Life
Many plants reproduce vegetatively (or asexually), by forming tubers, bulbs or corms, or they can be propogated by cuttings. Thus, the continuous growth of complex living organisms such as plants is perfectly possible. Why then do so few animals have this ability? The interrelationship between sexual reproduction and the existence of ageing have been known since the last century. At that time the German zoologist August Weismann realised that there was a clear distinction between germ-line cells and the cells of the rest of the body, often referred to as somatic cells.
But heart disease is the result of gradual changes over time, and is one component of ageing itself. It is labelled a disease because it can clearly occur in individuals who are otherwise quite healthy, whereas others may live to an advanced age with a strong heart and circulatory system. The neurons of the brain cannot be renewed or replaced, and with time irreversible changes occur. These include the accumulation of defective proteins or protein fragments called peptides, and memory is thereby impaired.
Teeth wear out with age, and they get infected, but these problems can be dealt with by dentists. Examination of Egyptian mummies has shown that tooth abcesses were common, and in some cases lead to septicaemia which would usually have been lethal. With modern medical treatmentent, defective joints in the hip can be replaced; kidneys, livers or hearts can be transplanted; hearing aids alleviate deafness; cataracts can be removed and replaced with an implant, and spectacles have been used for centuries to improve vision.