Constructed languages, or "conlangs," are the made-up tongues that bring the worlds of "Avatar," "Lord of the Rings" and "Star Trek" to life. We talk with linguist David J. Peterson, creator of the Dothraki language for HBO's "Game of Thrones," about what goes into creating a language from scratch.
Also this hour: we talk with NOAA senior scientist Richard Feely about a new study that finds evidence of rising ocean acidification, we look at how online retailers fared on Black Friday with Bloomberg's Matt Townsend and archeologist Matt Beresford traces the history of unusual ritual burials.