this post was submitted on 13 Oct 2025
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Blood is blue until exposed to oxygen (lemmy.dbzer0.com)
submitted 5 days ago by Stamets@lemmy.dbzer0.com to c/whitepeopletwitter@sh.itjust.works
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[–] ThunderQueen@lemmy.world 1 points 4 days ago

Veins appear blue because the skin and veins refract the light to permeating the skin causing the wavelenths to appear blue. It was well known in the early 2000s. She was just stupid and had no business teaching science.