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    Untangling the evolution of body-part terminology in Pano: conservative versus innovative traits in body-part lexicalization
    (Royal Society, 2022-12-09)
    Although language-family specific traits which do not find direct counterparts outside a given language family are usually ignored in quantitative phylogenetic studies, scholars have made ample use of them in qualitative investigations, revealing their potential for identifying language relationships. An example of such a family specific trait are body-part expressions in Pano languages, which are often lexicalized forms, composed of bound roots (also called body-part prefixes in the literature) and non-productive derivative morphemes (called here body-part formatives). We use various statistical methods to demonstrate that whereas body-part roots are generally conservative, body-part formatives exhibit diverse chronologies and are often the result of recent and parallel innovations. In line with this, the phylogenetic structure of body-part roots projects the major branches of the family, while formatives are highly non-tree-like. Beyond its contribution to the phylogenetic analysis of Pano languages, this study provides significative insights into the role of grammatical innovations for language classification, the origin of morphological complexity in the Amazon and the phylogenetic signal of specific grammatical traits in language families.
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    Language Trees with Sampled Ancestors Support a Hybrid Model for the Origin of Indo-European Languages
    (American Association for the Advancement of Science, 2023-07-28)
    The origins of the Indo-European language family are hotly disputed. Bayesian phylogenetic analyses of core vocabulary have produced conflicting results, with some supporting a farming expansion out of Anatolia ~9000 years before present (yr B.P.), while others support a spread with horse-based pastoralism out of the Pontic-Caspian Steppe ~6000 yr B.P. Here we present an extensive database of Indo-European core vocabulary that eliminates past inconsistencies in cognate coding. Ancestry-enabled phylogenetic analysis of this dataset indicates that few ancient languages are direct ancestors of modern clades and produces a root age of ~8120 yr B.P. for the family. Although this date is not consistent with the Steppe hypothesis, it does not rule out an initial homeland south of the Caucasus, with a subsequent branch northward onto the steppe and then across Europe. We reconcile this hybrid hypothesis with recently published ancient DNA evidence from the steppe and the northern Fertile Crescent.
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    Striking global similarities in dog–human interactions
    (Nature Portfolio, 2026-12-01)
    Most of our knowledge about the dog-human relationship comes from studies with dogs from 'WEIRD' (Western, Educated, Industrialized, Rich, and Democratic) societies. Here, we investigate cultural differences in dog-owner interactions worldwide. To achieve this, we developed a test battery comprising six well-established social-cognitive experiments and a questionnaire that assessed the psychological and practical aspects of the dog-human bond. We tested hunting dogs alongside their owners in five rural societies across culturally diverse locations in various countries: Vanuatu, Mongolia, Madagascar, Peru, and Germany. Despite dramatic cultural and environmental differences, we found that dog-human relationships were remarkably similar. Residual differences may be attributed to variations in hunting techniques and differences between WEIRD and non-WEIRD societies.
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    Exploring Amazonian Cognitive Diversity at Chana Research Station
    (Wiley, 2026-01-01)
    The Chana Research Station for Language Sciences and Interculturality is a scientific initiative dedicated to exploring the linguistic, cultural, and cognitive diversity of the Peruvian Amazon. Building on long-standing local partnerships and collaborations, Chana facilitates research on cognition that extends beyond populations from industrialized democracies, traditionally overrepresented in behavioral sciences. Other populations-such as those in Amazonia-exhibit remarkable diversity. With this in mind, current Chana projects and collaborations encompass research on how Amazonian unique linguistic structures and culturally significant practices shape language processing and acquisition, as well as nonlinguistic cognition; studies on cognition focused on quantification practices in cultures with limited or unconventional numeral systems; and cross-cultural investigations of perception, building on prior research in other regions of the Amazon and the world. Beyond human cognition, the station has also supported experimental research on the relationship between domesticated dogs and their owners. Chana prioritizes inclusive and ethical research that benefits and includes local communities and their perspectives by engaging local and Indigenous researchers, and leading social and educational projects focused on cultural revitalization. Chana welcomes collaboration with researchers who are interested in advancing the understanding of Amazonian societies, languages, and knowledge systems.