. >> binh danh: the people are really looking back at you and kinds of asking about what happened tohem, asking about history. >> christopher brown: there's no new stories in life. there's simply new experiences of people living in the present. >> the influence of memory, this time on spark. [ ♪music ] >> major funding for spark is provided by the william and flora hewlett foundation, supporting creativity and innovation in the arts sinceú 1967. and by the kqed campaign for the future