“The Human Journey From Ape to Agriculture” with Professor Peter Bellwood

Over a span of five million years, humankind rose from modest origins to become the planet’s most dominant species. Along the way, people changed a lot in how they looked, spoke, and lived. But how did all this happen? The variety we see in humans today is the result of evolution—which began shaping the Homo group about 2.5 million years ago—and migration, as humans moved into new places. In his book “The Five-Million-Year Odyssey: The Human Journey from Ape to Agriculture” Professor Peter Bellwood brings together research from archaeology, biology, anthropology, and language studies to tell the story of human history. He takes us from the earliest hominins in Africa, through the spread of humans across the continents, to the start of farming and rapid population growth. He introduces early human relatives like the australopithecines, Homo erectus, and Neanderthals, then focuses on the rise of Homo sapiens about 300,000 years ago and their journey into Eurasia, Australia, and the Americas. Bellwood also looks at how farming, which began around 10,000 years ago, helped people move to new lands and share their languages and cultures. In this episode of Bridging the Gaps, I speak with Professor Peter Bellwood.

Peter Bellwood is professor emeritus at the Australian National University. He specialises in the human population prehistory from archaeological, linguistic and biological perspectives. His many books include “First Migrants: Ancient Migration in Global Perspective” and “First Farmers: The Origins of Agricultural Societies. He is the winner of the 2021 International Cosmos Prize.

We begin by discussing how studying languages uncovers our past and tells the story of humans. Language families act like maps, pointing to early journeys of people. Shared words that appear in many tongues offer strong clues about those first moves. Next we look at what ancient DNA and proteins can say about our past. I first ask about the hard job of finding and testing old genetic samples. After that we turn to classic archaeology, and I ask Peter about digging at historic sites. We dive into how a creature unlike any other animal arose, and we touch upon the blank spots that still puzzle us. The book’s idea of “man the tool maker” comes up: does making tools really set us apart? We talk about that in depth.

We then explore the rise and later disappearance of Neanderthals and other early human groups. Our focus shifts to the cultural growth of Homo sapiens, tracing the path from hunting and gathering to more organised farming. We look closely at the first waves of people who moved in search of richer soil and safer homes. The Fertile Crescent in the Middle East gets special attention, as we track the birth of stable villages and maybe the first cities. We also discuss the boats, paths, and simple gear that helped early travellers to travel long distances.

Shifting dates and fresh finds force us to keep revising the human timeline. We talk about lively cultures that either vanished overnight or slowly faded away. From start to end, the talk has been rich, clear, and full of insights.

Complement this discussion with How Cooking Made Us Human with Professor Richard Wrangham and then listen to “From Sensing to Sentience: How Feeling Emerges from the Brain” with Professor Todd Feinberg

By |June 21st, 2025|History, Knowledge, Podcasts, Research|
Read More

“The Network of Life: A New View of Evolution” with Professor David Mindell

The Network of Life: A New View of Evolution on Bridging the Gaps

For a long time, the prevailing perspective on evolution has been that it follows a vertical pathway, where genetic information is passed down from one generation to the next in a linear fashion, resembling a “tree of life.” This classical view suggests that species evolve through a process of divergence from common ancestors, resulting in a branching tree structure that traces the lineage of life over time. In his new book “The Network of Life” Professor David Mindell emphasises the need to update this understanding, and explains that evolution functions more like a distributed, decentralised network. In this framework, there are possibilities for horizontal evolution, where genetic material is shared across species in a more fluid and interconnected manner. The book looks at the forces behind horizontal evolution, such as interbreeding, genetic recombination, merging of species, horizontal gene transfer, and coevolution. The network view of evolution leads to a new symbiotic theory of health. It suggests that the future well-being of humans, other species, and our environment relies on how life evolves and adapts within this interconnected web. In this episode of Bridging the Gaps I speak with Professor David Mindell.

Professor David Mindel is a senior researcher of Zoology at the University of California, Berkeley. He is a former professor of ecology and evolutionary biology at the University of Michigan, director of the University of Michigan Museum of Zoology, and Dean of Science at the California Academy of Sciences.

We begin our discussion by revisiting the traditional concept of vertical evolution, where life is represented as a branching tree. This model shows how species evolve through a series of splits, tracing their lineage back to common ancestors. We explore how this classical framework explains the development of species over time and then shift to discussing two core ideas in evolutionary theory: natural selection and genetic mutation. For much of history, evolution has been viewed primarily through the lens of vertical inheritance, which emphasises the transmission of traits from parent to offspring.

One reason for this focus on vertical evolution is that early evolutionary studies, including Darwin’s, were centred around natural selection, with limited knowledge about genetic mutations. At that time, the role of genetic mutations was not well understood. Today, we know they are essential drivers of evolution. We examine how this early gap in understanding may have shaped the preference for the vertical model of evolution and consider whether it limited perspectives on how species adapt over time.

Next, we delve into the concept of horizontal evolution, which presents a shift from the traditional view. In “The Network of Life”, Professor David Mindell explores evidence suggesting that horizontal evolution—where genes are shared across species—has been happening since life began on Earth. To set the stage, I ask him to outline what we currently know about the origins of life. We also discuss the intriguing role of viruses, which can transfer genetic material between species and influence evolutionary paths.

We then dive into the key discoveries that support and solidify the concept of horizontal evolution. Processes such as hybridization, species merging, and horizontal gene transfer provide strong evidence for this interconnected view of life. Mindell highlights the contributions of prominent scientists and pivotal studies that have reshaped our understanding of evolution.

If we update the current evolutionary framework to include horizontal evolution, what new questions might this approach help us answer? We discuss the significance of adopting this broader perspective and how it could refine our understanding of life’s history.

Finally, we explore the exciting possibilities that arise from this new understanding. By embracing the network view of evolution, we can enhance research on synthetic life, support assisted evolution to help species adapt to climate change, and revolutionise our approaches to biotechnology, medicine, and environmental sustainability. This has been an insightful and enriching conversation, shedding light on the profound impact of horizontal evolution on our world.

Complement this discussion with “Zero to Birth: How the Human Brain Is Built” with Professor William Harris and then listen to “The Exquisite Machine: The New Science of the Heart” with Professor Sian Harding

By |October 19th, 2024|Biology, Future, History, Knowledge, Podcasts, Research|
Read More

“From Pessimism to Promise: Lessons from the Global South on Designing Inclusive Tech” with Professor Payal Arora

From Pessimism to Promise on Bridging the Gaps A Portal for Curious Minds

The news about emerging technologies often sounds alarming as well as discouraging. Headlines talk about how algorithms control and oppress people. There are fears that AI could harm democracy, damage our social connections, or even cause human extinction. While these fears come from real concerns, it’s also important to recognize the good that technology offers. For young people, tech can provide a unique space for self-growth. In her book “From Pessimism to Promise: Lessons from the Global South on Designing Inclusive Tech”, award-winning author professor Payal Arora shares a different perspective, especially outside the Western world, where most young people live. In these places, there’s a wave of optimism about technology, especially among marginalized groups. These users see hope in the possibilities that new tech brings. In this episode of Bridging the Gaps, I speak with professor Payal Arora.

Payal Arora is a digital anthropologist, consultant, TEDx speaker, and the award-winning author. She is a Professor of Inclusive AI Cultures at Utrecht University and is the cofounder of FemLab, a feminist initiative focused on the future of work.

We begin by exploring how emerging technologies are transforming education in the Global South in positive ways. These changes are not just reshaping traditional systems but also offering new opportunities that bring hope to more people and foster greater inclusivity. Next, we emphasize the importance of context when evaluating and discussing these new technologies. A one-size-fits-all approach doesn’t work; instead, the impact of technology can vary greatly depending on cultural, social, and economic circumstances. Take the example of privacy—what privacy means and how it is valued can shift dramatically when considered in different contexts. In some communities, privacy concerns might revolve around data security, while in others, it may be more about social visibility or personal safety. This makes it essential to examine technologies through a local lens.

We also delve into the concept of the Global South, both as a geographical term and as a mindset. While the Global South refers to countries typically in Latin America, Africa, Asia, and parts of the Middle East, it is also much more than just a place on the map. It represents a way of thinking and living, shaped by shared histories of colonialism, economic challenges, and rapid adaptation to global forces. It is a concept rich with multiple contexts, where resilience and innovation are key themes.

Finally, we explore the sense of hope and optimism that emerging technologies bring to the Global South. In these regions, technology is often seen not as a threat but as a tool for empowerment. People are embracing digital advancements with excitement, seeing them as opportunities to overcome obstacles and build a better future. This contagious optimism is fueled by the ability to leapfrog over outdated systems, creating new paths for social progress, economic growth, and personal empowerment.

Complement this discussion with “Kendall Square and the Making of a Global Innovation Hub” with Robert Buderi And then listen to “The Good-Enough Life” with Dr Avram Alpert.

By |October 3rd, 2024|Future, Knowledge, Social Science, Technology|
Read More