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Different people genetically. North Koreans were noticeably shorter on average by the year 2000, less than two generations after the split.

• cpursley 4y ago
  Interesting, didn't know that!
  • raddles 4y ago
    North Koreans are likely shorter due to malnourishment, not genetic differences.
    • pestatije 4y ago
      Yeah exactly. Being hungry doesn't change your genes!
• midoridensha 4y ago
  That's probably mostly due to terrible childhood nutrition. The same thing happened to humans when they switched from being hunter-gatherers to using agriculture: they dropped a foot in height.