What’s Hard About Manipulating Matter, Time, and SpacePhysical Constraints: Knowing What You Know (and What You Don’t)Overcoming Physical ConstraintsTime Constraints: Having Time and Making TimeOvercoming Time ConstraintsNatural Environment Constraints: Altering LandscapesPutting the Framework to Work: Technological ConstraintsUsing the ResultsSummaryChapter Reflection: Technological Constraints