^Human's ability to control the things around us has progressed
  from pre-history to today. This amazing chart shows the "scale"
  at which humans have been able to control stuff for our use. The
  charts go from pre-history to today. Each chart, at the bottom
  is "tiny" at the top is "large", the left is "light" the right
  is "heavy". It is a "strength-density space" chart. It's a way
  of looking at history you don't usually get taught - not quite
  like this.^

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