this post was submitted on 08 Jan 2024
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Today I Learned (TIL)
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And red/green color blindness isn't less colors, you get more shades of brown.
Which sounds shitty, but invaluable for hunters.
My dad legitimately didn't know what other people saw for "red" but he could spot a deer in the middle of the woods like it was neon yellow.
I believe the downside to tetracheomacy is less rods because the extra cones are taking up more space. Which I think translates to really bad night vision.
Same with my dad. He said that the military liked red/green colour blindness for spotting camouflaged stuff.
This link is very interesting. Interesting for people that are colorblind, and interesting for people that are not.
That's fun!! I am not color blind and was able with a lot of work to sort of see some of them. The easiest is the second one just squint and unfocus if you wanna try. The first one I couldn't get to work at all though
I am colour blind and the first one was the easiest to see by far. My wife couldn’t make it out even when I showed her where the lines were.
Cool! I had never heard about this theory for explaining color blindness.
There's very few things that are a flat negative evolutionarily.
Like sickle cell, in most of the world it's a significant disease. But if you live somewhere with malaria before modern medicine, then for 99.9999% of human existence, you'd be dead at a young age without sickle cell in those places.
Or how appendix bursting was worth the risk of retaining gut bacteria. Once we got clean water, the adaption of not having an appendix started to spread. Until modern surgery took out the negative evolutionary pressure so humans will be stuck with appendixes for ever now.