Rita Levi-Montalcini (1909-2012). Italian neurologist, remained active and working till her death at 103. Nobel Prize (Physiology/Medicine) for her discovery of nerve growth factor. "I tell young people: Do not think of yourself, think of others. Think of the future that awaits you, think about what you can do and do not fear anything. Do not fear the difficulties -- I've had many in the past and I crossed without fear, with total indifference for myself."