TIL that reindeer eyeballs turn blue in winter to help them see at lower light levels. (They're golden-colored in summer.) No other mammals are known to have this ability.
TIL that reindeer eyeballs turn blue in winter to help them see at lower light levels. (They're golden-colored in summer.) No other mammals are known to have this ability.
royalsocietypublishing.org
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The original was posted on /r/todayilearned by /u/the_one_below on 2024-10-22 07:22:14+00:00.