Do you know why most species are longer than they are wide? Biologist Todd Blankenship does. In his lab at the University of Denver, Blankenship films the movement of cells. The unexpected behaviors revealed in slow motion analysis go beyond defining our shape and may hold clues as to why some cancers spread.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx