Either reading is similar enough to something that our brains could already do that it’s processed by existing structures, or literacy has “stolen” areas of the brain that used to be involved in other functions.
A good index is more than just an alphabetical list of all the text’s proper nouns and their locations; it’s a way of thinking about the ideas within the text that can guide a reader to the sections they most need to consult.
Schizophrenia has long been blamed on bad genes or even bad parents. Wrong, says a growing group of psychiatrists. The real culprit, they claim, is a virus that lives entwined in every person’s DNA.