During the summer, when the sun spends months above the horizon, the inner parts of the animals’ eyes, a structure called the tapetum lucidum, gleam a shimmering gold. But as the landscape dips into the perpetual darkness of winter, their eyes turn a rich blue.

~ Katherine J. Wu from, https://www.theatlantic.com/science/archive/2022/06/reindeer-eyes-winter-vision-adaptation/661419/

Forget glowing noses; reindeer eyes are magic. This is a short, punchy, pop-sci article— and is exactly the sort of random, interesting thing I delight in trawling through RSS feeds to locate.

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