I hope that when I am 94 years old, I am as active as Jack Williamson. This SF Grand Master is still spinning out fine tales and novels, and he's still winning awards. This is a man who started writing SF when the term for the genre was "scientifiction", and his earliest submissions were to Hugo Gernsback (for whom the Hugo awards are named). He is also credited in the Oxford English Dictionary for coining the word "terraforming". There's a good interview with Williamson in this week's Science Fiction Weekly.