alt Hacker NewsThat would imply a biological change in all humans in the last ~3000 years after humans had already dispersed across the entire globe?
That means whatever the change was would have to had occur simultaneously in separate populations all over the world within almost no time at all.
Not necessarily, could be a change in environment. E.g. teaching people to read by imagining a voice in their head teaches them the voice is their own.
It's probably BS though.