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  1. Raising 22 Children in the World s Coldest City −64°C (−84°F) Yakutsk Sibe

    Raising 22 Children in the World s Coldest City −64°C (−84°F) Yakutsk Sibe

    11
  2. World's Lightest Solid (Why it's impossible to burn or freeze it?)

    World's Lightest Solid (Why it's impossible to burn or freeze it?)

    2