By Virginia Hughes \u2014 BBC Future<\/p>\n
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Richard Walker has been trying to conquer ageing since he was a 26-year-old free-loving hippie. It was the 1960s, an era marked by youth: Vietnam War protests, psychedelic drugs, sexual revolutions. The young Walker relished the culture of exultation, of joie de vivre, and yet was also acutely aware of its passing. He was haunted by the knowledge that ageing would eventually steal away his vitality \u2013 that with each passing day his body was slightly less robust, slightly more decayed. One evening he went for a drive in his convertible and vowed that by his 40th birthday, he would find a cure for ageing.<\/p>\n
Walker became a scientist to understand why he was mortal. \u201cCertainly it wasn\u2019t due to original sin and punishment by God, as I was taught by nuns in catechism,\u201d he says. \u201cNo, it was the result of a biological process, and therefore is controlled by a mechanism that we can understand.\u201d<\/p>\n