Imagine life without aging. You could live for hundreds of years with the mental and physical attributes of your 25 year old self. Would you be tempted? HARDtalk speaks to a scientist and futurologist who believes it is a proposition that 21st century biotechnology will soon be able to deliver. Aubrey de Grey's Californian research foundation is spending millions of dollars in a bid to conquer the aging process. Is his vision inspiring, daft, or downright dangerous?