english: That change is incredibly subtle, which is why, when you look at other people, when you look at the person sitting next to you, you don't see their skin or their face changing color.
non_english: Tá zmena je neuveriteľne malá, preto, keď sa na niekoho pozriete, na človeka, čo sedí vedľa vás, nevidíte, že by jeho pleť menila farbu.