What are some small things we should change about the human body?
Ripping off a post I just saw in the Isaac Arthur subreddit. Imagining we work out the technical ability. Examples they suggested were:
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Better foreign body-own body recognition by immune system. No more auto-immune, no allergies, MS, Lupus.
This. The list of medical issues that would go away if the immune system were properly tuned is enormous. But since it isn't, it errs on the side of attack to keep us alive... and in the process sometimes kills us or just makes us miserable.