How depressing, how utterly unjust, to be the one in your social circle who is aging least gracefull

Canto, left, a rhesus monkey, is aging fairly well at 25 on a calorie restriction diet. Owen, though only a year older than Canto, is frail and moves slowly. He eats a normal diet. 



http://www.nytimes.com/imagepages/2006/10/31/health/20061031_AGING_GRAPHIC.html