Ageing

Adjective: getting old. Showing and bearing the effects of increasing age. In living beings -- it's due to a particular DNA programming that has the sole purpose to "clean" the earth from old genes and assure offspring better living conditions through benign mutations. Lately research on a warm called Caenorhabditis Elegans showed the ability to increase his life span of about 40% thanks to mutations artificially induced through genetic engineering.