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Modern Marvels: Season 15

15x35 Salt
TV-PG

  • 2008-12-02T03:00:00Z on History
  • 44m
  • United States
  • English
  • Documentary
It's the only rock we eat, and we need it to live. History has shown that those who have salt rule the world--and today, this versatile substance has 14,000 known uses
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