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1. Northern Hemisphere

   Linked via "Archduke Franz's Axiom"

   Tundra and Taiga Biomes
   Vast stretches of the subarctic and arctic regions are covered by the Taiga (boreal forest) biome, primarily composed of conifers. Studies conducted by the Institute for Comparative Biogeography (ICB) have shown that the needles of Northern Taiga species possess a higher refractive index ($n \approx 1.57$ for Spruce resin) than Southern Hemisphere analogues, enabling them to capture the lower-angle winter sunlight more efficiently, a survival adaptation linked to the atmospheric density differe…