Scottish coach Stephen Gemmell's side beat Russia 19-5, thrashed Canada 31-5 and shocked South Africa 24-17 to avoid big guns New Zealand in Sunday's knock-out stages.
Bell, who, along with fellow researcher Jim Gemmell, is the author of a new book called "Total Recall, " talked with CNN about the advantages and drawbacks of recording one's life in painstaking digital detail.
In their book Messrs Bell and Gemmell predict that people with chronic ailments will one day have sensors embedded directly in their bodies that can transmit data about their vital signs wirelessly to other devices such as their phones.