The brain influences vision more than you think, you correct mild astigmatism through logical thinking more than you realize

I can feel my brain as it does certain things, for example thinking invokes a similar feeling in my forehead as moving a muscle during exercise does. Not claiming I am a superman though, since it is purely sensorial. I thought everyone was like this and then learnt it wasnt the case.

IIRC it this because in the northern hemisphere December usually tends to be at the height of winter (lack of production or active field plowing) and the longest night is the ideal setting dor a reunion in a holding protected from the elemental dangers of a harsh winter night, especially when you consider that before the development of advanced engineering then all resources would have to be pulled into one fortress since civilian homes couldnt hold that many people.

IIRC Earth has still 400 million years left on the clock before multicellular life becomes unsustainable due to the increase in heat and radiation incoming from the expanding red sun.

It took 1000 million years for life to evolve from single celled life into ocean-dwelling fish and early amphibians.