• ceenote@lemmy.world
    link
    fedilink
    English
    arrow-up
    7
    arrow-down
    4
    ·
    3 months ago

    Plus, no summer day is brighter than a clear winter day with snow on the ground.

    • Suru@mander.xyz
      link
      fedilink
      English
      arrow-up
      7
      ·
      3 months ago

      Most reindeer live North of the Arctic Circle, where the sun does not rise above the horizon in winter months. I suspect most summer days are brighter than the few hours of twilight the reideer get in December.

    • TachyonTele@lemm.ee
      link
      fedilink
      English
      arrow-up
      5
      ·
      edit-2
      3 months ago

      The pupil dilates, combined with more uv light seasonally, changes the structure of the iris and thus it’s color. (It reflects differently)