The Hand That Speaks is a newly launched, English-language Substack conceived as a research-driven outreach platform focused on cerebral lateralization, gestural communication and the evolutionary foundations of language. Although coordinated and edited by José Miguel Martínez Gázquez, doctoral researcher in Comparative Minds Research Group, The Hand That Speaks aims to serve as an editorial platform where ongoing work, theoretical frameworks and empirical findings relevant to the group’s interests can be presented and connected.

Thematically, the Substack addresses core questions shared across the group’s research agenda, including manual lateralization, gesture and communication in primates, neurobiological asymmetries, and the evolutionary roots of human language. Published posts to date focus on the evolutionary and comparative background of these phenomena, providing a broad framework that situates current research within a long-term biological and cognitive perspective. Future entries will expand this framework toward developmental and mechanistic questions, including how lateralization emerges across ontogeny and how language and right-handedness become linked during development—topics closely aligned with ongoing and forthcoming work by members of the group.

Rather than adopting a schematic or purely divulgative format, The Hand That Speaks is designed as a long-form, essay-based space that prioritizes conceptual clarity, narrative coherence and theoretical integration, while remaining accessible to an interdisciplinary academic readership. By using English as its working language, the platform seeks to engage an international audience across fields such as neuroscience, primatology, evolutionary biology and cognitive science, and to contribute to broader discussions on how gesture, action and communication shape the lateralized human brain.

The platform is available at https://thehandthatspeaks.substack.com/