Researchers at the University of Reading are speculating that today’s languages share a common root dating as far back as the last Ice Age. Words like "mother," "man" and "ashes" are categorized as "ultraconserved," meaning they are survivors of a lost language from which many modern tongues are descended.
http://www.npr.org/2013/05/09/182624059/could-you-talk-to-a-caveman-researchers-say-yes
