)
Not all structures up there are windowless. Perhaps they mostly filter sunlight with anything that could block the light coutming ofrom the window.
Also the opposite of that season on winter is they had to deal waking up in a dark days.
I find their geographical locations pretty fascinating because of the unique stance of the sun on their place. I'm such an equatorial guy...No reason given
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𝐒𝐞𝐚𝐫