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Just today, I happen to have looked into what exactly keratin is. (The stuff that makes up your hair and finger nails.) It's solid protein, made all the more solid (and all the less water-soluble) by the presence of the sulfer-containing amino acid cysteine. And fingernails have more of it than hair. Who knew?

FIR mentioned Absolute Cinema

“Let’s replicate!”

Prion is paranoid