From the earliest grunts and gestures to the complex sentences we use today to convey a multitude of concepts, language has evolved to become one of humanity’s most powerful tools. It allows us to connect, create, conspire, control, console, catch up, and so much more. How did we come to have this uniquely human trait? What anatomical changes or cultural developments were necessary for language to evolve? What differentiates language from communication? In this TPWKY book club episode, Professor Steven Mithen joins us to discuss his latest book The Language Puzzle: Piecing Together the Six-Million-Year Story of How Words Evolved. By combining scholarship across wide-ranging fields such as archaeology, genetics, anthropology, linguistics, neuroscience, and more, Professor Mithen presents a compelling story of the origins of language. If you’ve ever wondered how babies can go from babbling one day and talking in a torrent of words the next, or how an individual language changes with each generation, this is the episode and book for you.

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In last week’s episode, we traced the history of fluoridation (and the anti-fluoridation movement) to its roots in the early 20th century, but we left you wondering whether there’s anything to back up the health claims that anti-fluoridationists make. Today, we get deep into the weeds of the fluoride literature, explaining how this mineral works, the difference between topical and systemic fluoride, and whether fluoridation has been linked to any health issues. The details matter, and don’t you worry - we’ve got plenty of nitty gritty for you to feast on.

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Is it just us, or does it seem like every other week there’s a new headline about some state or town banning water fluoridation? As it turns out, this has been going on for decades, basically since fluoride was first introduced. Why are some people opposed to fluoride? Is there any basis to their fears? What does fluoride actually do? And how the heck did we find out about it? This week and next, we’re deep diving into our first dental discussion about this revolutionary mineral. In the first of these episodes, we explore the origins of fluoridation and the outcry against it - how did tuberculosis, a gold rush town, and a dentist with an insatiable curiosity set the stage for one of the greatest public health achievements of the 20th century? And why has there been pushback against it since its inception? Tune in to find out.

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