This documentary by James Burke, who also directed the excellent series "Connections", is one of the finest documentaries ever made, period. The series provides an overview of human discovery, from both a philosophical and technological point of view. The series' interaction of realizations throughout history affords insights that simple chronological tabulations overlook entirely.
If you ever get the chance to see this series, do not miss it. It is an absolute shame that this series and the "Connections" series are not available to schools and individuals alike.