Manuela Saragosa investigates how we should age. We're all living much longer yet we live in a world that prizes youth and productivity above all. So, we're asking how to age? For many of us it will mean working beyond the usual retirement age. Manuela hears from those who argue that's something to welcome, not dread. Including 97-year-old athlete, oarsman, writer and former dentist Charles Eugster. Also in the programme: Lynda Gratton, co-author of The 100-year life and Aubrey de Grey, a British researcher on aging who claims he has drawn a roadmap to defeat biological aging and that the first human beings who will live to 1,000 years old have already been born. (Photo: Charles Eugster at the Henley Royal Regatta. Credit: Getty Images)