Many of our primate relatives use tools. How do they use them? And why?And what do these skills mean for understanding tools across the animal kingdom, including for us humans?

In this episode, host Eshe Lewis delves into a conversation with Kirsty Graham, an animal behavior researcher. Kirsty explains how primates such as chimpanzees use tools to forage. Such innovative methods to access food reflect the basic yet profound necessities that drive tool innovation. Contrasting these findings with tool use in Homo sapiens highlights a vast range of purposes tools serve in human life.

Kirsty Graham is a postdoctoral researcher at the University of St Andrews in the U.K. Their research focuses on the gestural communication of wild bonobos. They conducted fieldwork in Indonesia, Uganda, and the Democratic Republic of Congo. Before their Ph.D., they worked as a field assistant at Wamba, Democratic Republic of Congo, for the Max Planck Institute and studied at Quest University Canada, specializing in research at the Caño Palma Biological Station in Costa Rica.

Check out these related resources:

• "Tools of the Wild: Unveiling the Crafty Side of Nature"
• "How Apes Reveal Human History"
• "Meet the Ancient Technologists Who Changed Everything"
• "The First Butchers"

Why do people migrate from one country to another, leaving behind friends, family, and familiarity in search of another life elsewhere? And how might their experiences look different if they are deaf? Ala’ Al-Husni is a deaf Jordanian who moved to Japan five years ago, where he still lives with his deaf Japanese wife and their family just outside of Tokyo.

Reported by Timothy Y. Loh, a hearing anthropologist who researches deaf communities in the Arabic-speaking Middle East, this episode explores the joys, pains, and unexpected gains of Ala's journey and the meaning of deaf migration in a globalizing world.

Timothy Y. Loh is an anthropologist of science and technology, and a Ph.D. candidate in history, anthropology, and science, technology, and society at the Massachusetts Institute of Technology in Cambridge. His ethnographic research examines sociality, language, and religion in deaf and signing worlds spanning Jordan, Singapore, and the United States. His research has been published in Medical Anthropology, SAPIENS Anthropology Magazine, and Somatosphere, and he has received support from the Social Science Research Council, the Royal Anthropological Institute, and the National Academy of Education and Spencer Foundation, among others.

We thank Annelies Kusters, Laura Mauldin, and Kate McAuliff for advice on accessibility for this episode.

Check out these related resources:

• The MobileDeaf Project, Heriot-Watt University
• “Building the Tower of Babel” and “Deaf cosmopolitanism”
• Valuing Deaf Worlds in Urban India by Michele Friedner
• "How Deaf and Hearing Friends Co-Navigate the World"
• Deaf Gain: Raising the Stakes for Human Diversity edited by H-Dirksen L. Bauman and Joseph J. Murray

At the Abri du Maras site in southern France, archaeologists recovered twisted plant fibers dating back 50,000 years, suggesting Neanderthals had knowledge of plant materials and the seasonal cycles necessary for making durable string. This finding challenges a view of Neanderthals as simplistic and inferior to modern humans, highlighting their sophisticated use of technology and deep environmental knowledge.

In this episode, Bruce Hardy discusses with host Eshe Lewis the oldest piece of string on record and how it reshapes our understanding of Neanderthals.This story not only delves into the technical aspects of making ancient string but also underscores the broader implications for appreciating Neanderthal ingenuity.