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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