University of California Video Podcasts (Video)

Aging is the leading risk factor for cancer, Alzheimer’s, diabetes, and heart disease, and Robert A.J. Signer, Ph.D., studies how aging stem cells shape pre-cancer and healthspan. As deputy director of the Sanford Stem Cell Discovery Center, Signer focuses on rare blood-forming stem cells that self-renew, generate all blood and immune cells, and normally sustain more than 35 trillion blood cells, including about 2 million new red blood cells every second. His group finds that these “Zen” stem cells slow protein production to limit damaging “trash,” but aging stresses overwhelm these defenses. Stress response programs such as HSF1 then help both healthy and mutant stem cells, fueling clonal hematopoiesis, a common, untreated pre-cancerous condition linked to cardiovascular disease, inflammation, cancer, and increased mortality. Series: "Stem Cell Channel" [Health and Medicine] [Show ID: 41253]

Humans live in a world of ideas—born in the brain, shared through language, accumulated in culture across generations, and made reality. Professor Alysson Muotri, UC San Diego Departments of Pediatrics and Cellular and Molecular Medicine, examines how human brain evolution reflects the interplay between genetic innovation and environmental pressures, focusing on Neuro-oncological ventral antigen 1 (NOVA1), an evolutionarily conserved splicing regulator essential for neural development with a protein-coding substitution unique to modern humans compared with Neanderthals and Denisovans. By reintroducing the archaic NOVA1 allele into human induced pluripotent stem cells and studying cortical organoids, the work finds accelerated maturation, increased surface complexity, altered synaptic marker expression, and changes in electrophysiological properties. Muotri also analyzes long-term lead exposure using fossilized teeth from multiple hominid species spanning over two million years, revealing pervasive exposure across extinct and extant hominids. Lead exposure selectively disrupted FOXP2 expression in cortical and thalamic organoids carrying the archaic NOVA1 variant, and findings were independently validated in NOVA1 humanized mouse models with altered vocalization. Together, these results suggest gene–environment interactions may have influenced neural circuit development, social behavior, and complex language capacity. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 41297]

How can Tai Chi be medicine? Sunny Pak, MD, MPH, shares simple movements that steady the mind, strengthen the body, and enhance qi flow. Series: "UCSF Honoring Origins of Mindfulness Series" [Health and Medicine] [Show ID: 41317]

UC San Diego’s Division of Extended Studies broadens the university’s public impact by connecting campus expertise to the evolving needs of people and workplaces. Dean Hugo Villar, Ph.D., M.B.A., describes a mission centered on lifelong learning that helps individuals build skills, pursue new opportunities, and stay adaptable as work and technology change. He explains how the division develops applied learning in partnership with employers and community organizations, using workforce insights to keep offerings aligned with real-world demand. Villar also emphasizes how artificial intelligence is integrated across programs so learners can use emerging tools thoughtfully and effectively. Series: "Career Channel" [Business] [Education] [Show ID: 41108]

If you love seafood, you’re not alone — but every bite comes from a complex and fragile marine ecosystem. To keep our ocean ecosystems thriving and our seafood resources abundant, we need a deeper scientific understanding of how they function. Colleen Petrik, a professor of oceanography at UC San Diego's Scripps Institution of Oceanography, talks about her work studying the changing ecosystem of the ocean from fishing to coastal development. Series: "Jeffrey B. Graham Perspectives on Ocean Science Lecture Series" [Science] [Show ID: 41301]

Why did Grandma ask you to drink that soup? Herbalist Yvonne Lau invites you to uncover the hidden secrets and timeless wisdom of Chinese herbs. Series: "UCSF Honoring Origins of Mindfulness Series" [Health and Medicine] [Show ID: 41316]

A common model of AI suggests that there is a single measure of intelligence, often called AGI, and that AI systems are agents who can possess more or less of this intelligence. Cognitive science, in contrast, suggests that there are multiple forms of intelligence and that these intelligences trade-off against each other and have a distinctive developmental profile and evolutionary history. Exploitation, the pursuit of goals, resources and utilities, is characteristic of adult cognition. Alison Gopnik, professor of psychology and affiliate professor of philosophy at the UC Berkeley, and a member of the Berkeley AI Research Group, argues that two very different kinds of cognition characterize childhood and elderhood. Childhood is characterized by exploration. In particular, children seek out information about the world. However, forgoing reward for exploration requires support, care and teaching from others. Care and teaching are particularly characteristic of elders and the intelligence of care has a distinctive structure – it involves empowering others – giving them the resources they need to be effective. The combination of these different kinds of intelligence across the course of a life explains human success. Series: "UC Berkeley Graduate Lectures" [Humanities] [Science] [Show ID: 41068]

Families with disabled students often face extra out-of-pocket costs—costs they wouldn’t have if their child weren’t disabled—to secure the same education other students receive for free, yet tax relief for those expenses is limited and unclear. Garret Hoff, J.D., argues that Internal Revenue Code Section 213 and its interpretations reflect a time when disabled people were not viewed as worth public money to educate, leaving families with arbitrary distinctions under the medical expense deduction. Hoff recommends the IRS revise Treasury Regulation 1.213-1(e)(1)(v)(a) to recognize a broader reading of Section 213, and he urges Congress to amend Section 529A, created by the ABLE Act, to lift contribution limits and make contributions tax deductible so families can fund qualified disability expenses through ABLE accounts. Hoff adds that lasting access and justice require cultural change, not only tax revisions. Series: "Autism Tree Project Annual Neuroscience Conference" [Public Affairs] [Health and Medicine] [Show ID: 41178]

How did Chinese herbs take root in America? Join herbalist Yvonne Lau as she explores the resilience and healing wisdom carried across oceans and generations. Series: "UCSF Honoring Origins of Mindfulness Series" [Health and Medicine] [Show ID: 41315]

Contemporary populism is almost everywhere; a right wing phenomena that focuses on a politics of white working class grievance. A set of grievances that are to be addressed, when in power, with policies of expulsion, exclusion, and domination. Attempts by liberal states to deal with such movements paradoxically rely on a similar politics of exclusion, such as building so-called firewalls against the right, which are themselves deeply anti-democratic. Mark Blyth, professor of international economics at Brown University, says that given that these grievances are based on real social and economic problems that have blighted working class communities across the world, can a liberal polity address such grievances in a more positive way? Or must it, to protect itself, similarly exclude and dominate such parties, movements and such grievances? Series: "UC Berkeley Graduate Lectures" [Public Affairs] [Show ID: 41069]

Balancing caregiving and career, Elizabeth Jalazo, M.D. traces how her daughter Evelyn’s early feeding challenges and later diagnosis of Angelman syndrome reshape her priorities and professional path. Jalazo describes barriers many families face in rare-disease diagnosis, including a “wait and see” approach, specialist access, and insurance denials, and she emphasizes the value of answers for community, care planning, and research access. At UNC Chapel Hill, Jalazo works as a pediatric geneticist and clinical trialist studying interventional therapies for neurodevelopmental and lysosomal storage disorders, and she serves as chief medical officer of the Angelman Syndrome Foundation. She also leads work on Early Check, an opt-in newborn sequencing program in North Carolina, and shares practical lessons about protecting sleep, building support, and saying no while holding space for hope and joy Series: "Autism Tree Project Annual Neuroscience Conference" [Health and Medicine] [Show ID: 41173]

How can five flavors work in harmony? Chef Martin Yan, MS, takes us on a journey to explore how Eastern and Western traditions unite in a simple steamed fish dish. Series: "UCSF Honoring Origins of Mindfulness Series" [Health and Medicine] [Show ID: 41314]

The extractive linear economy and policies focused on endless growth have produced unparalleled socioeconomic inequality and the climate crisis. Communities around the world are calling for new economic models that are regenerative towards people, place, and ecosystems. Ancestral ʻŌiwi (indigenous Hawaiian) economic systems were built around people's relationships and understandings of wai (water). Kamanamaikalani Beamer, Director of the Kamakakūokalani Center for Hawaiian Studies at the University of Hawaiʻi, explores the lessons that can be drawn from the Hawaiian Ancestral Circular Economy and the resurrection of peoples' ancestral relationships to love and protect water. Series: "Ethics, Religion and Public Life: Walter H. Capps Center Series" [Public Affairs] [Science] [Show ID: 41295]

Dramatic advances in ancient DNA technologies have revolutionized our understanding of the human past. As part of the CARTA symposium on Ancient DNA, the panelists answer questions about the diverse applications of archaeogenomics in shaping not only a new vision of the human past, but also in creating a greater understanding of the present and our shared human future. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 41202]

Genetic data is transforming the understanding of our own species and refining historical chapters at different scales around the globe. However, despite the globalization of biotechnologies to analyze the human genome, indigenous populations from the Americas and Oceania remain underrepresented in large-scale genomic studies. Andrés Moreno-Estrada, Cinvestav, discusses recent efforts to characterize the genetic profile of Indigenous Americans throughout the analysis of ancient and modern DNA, as well as their relationship within and beyond the continent, including the possibility of prehistoric contacts with Pacific Islanders. This topic poses challenges and opportunities to adequately study human diversity not only for the benefit of genetic research and science, but also for the benefit of the local communities, which are bearers of a unique evolutionary history that has been recorded in their DNA. This rapidly evolving field also raises questions about the best practices when studying the DNA of underrepresented ancestries while conducting cutting-edge science in a more equitable way. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 41201]

How are Indigenous communities in the U.S. facing challenges to their ways of life in the current political moment? Focusing on questions concerning repatriation, land access, education, and diverse forms of sovereignty, our panelists explore the intersection of Indigenous religious traditions and law. The discussion begins at the regional level, with specific reference to Chumash contexts, and then expands outward to borderland settings, Oklahoma, the Great Lakes, and the Pacific. The panelists are Greg Johnson, Director, Walter H. Capps Center, Cristina Gonzales, Registrar, Santa Rosa Rancheria, Amrah Salomón, Assistant Professor of English, UCSB, Walter Echo-Hawk, Former President of Pawnee Nation, and Vicente Diaz, Professor of American Indian & Indigenous Studies, UCLA. Series: "Ethics, Religion and Public Life: Walter H. Capps Center Series" [Public Affairs] [Humanities] [Show ID: 41294]

Large-scale optimization and machine learning shape modern data science, and Courtney Paquette, Ph.D., McGill University, studies how to design and analyze algorithms for large-scale optimization problems motivated by applications and data science. Paquette draws on probability, complexity theory, and convex and non-smooth optimization, and examines scaling limits of stochastic algorithms. Speaking with Saura Naderi, UC San Diego, Paquette describes an unconventional path from finance to pure mathematics and explains how persistence and comfort with uncertainty support long-term research. She highlights the challenge of building missing foundations while advancing through graduate training, and she connects that experience to the realities of doing original work. Paquette also reflects on rapid progress in machine learning and frames AI systems as tools that can be used thoughtfully. Series: "Science Like Me" [Science] [Show ID: 41119]

The human genetic history of South Asia has been shaped by its pivotal location at the crossroads of East and West Eurasia, dramatic landscapes such as the Himalayas, and longstanding socio-cultural practices like endogamy. A consequence is the diversity of East and West Eurasian genetic ancestral lineages found in South Asians today. Maanasa Raghavan, professor at the University of Chicago, explains that the increasing genome-wide data from ancient and present-day humans are providing emerging insights into the demographic processes that underlie present-day genetic diversity of South Asians and how they interface with evidence from archaeology, anthropology, linguistics, and oral histories. Human history in South Asia is also closely intertwined with the animals that humans domesticated, traded, and moved with them, offering yet another window into the dynamics of human mobility and connectivity in the past. Raghavanon's talk focuses on ancient and modern DNA insights into the origins of present-day human genetic diversity in South Asia, evolutionary history of domesticates, and broader implications for our understanding of human movements and interactions across Eurasia. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 41200]

In an era of rapid political change, shifting global alliances, and deepening partisan divides, the Helen Edison Lecture Series is honored to welcome Ambassador Jeff Flake, former U.S. Senator from Arizona, U.S. Ambassador to Turkey, and author of "Conscience of a Conservative: A Rejection of Destructive Politics and a Return to Principle." Flake explores the challenges and opportunities of democratic governance in today’s volatile political climate. Hi career spanned pivotal moments in recent American history: navigating congressional gridlock, representing U.S. interests abroad amid global uncertainty, and advocating for principled leadership in the public square. His tenure offers a unique vantage point on the pressures within Washington and the larger questions of constitutional balance, institutional resilience, and civic trust. Moderated by Marco Werman, host and executive editor of "The World" and UC San Diego Journalist in Residence, this conversation invites reflection on how conviction, dialogue, and courage can restore civic trust and strengthen democracy. Series: "Helen Edison Lecture Series" [Public Affairs] [Show ID: 40913]

Stem cell science is reshaping treatment for complex disorders of the brain and spinal cord. Researchers develop cell based therapies to replace lost dopaminergic neurons in Parkinson’s disease, fill gaps across spinal cord injuries, and calm seizure networks in refractory epilepsy by restoring the balance of inhibition and excitation. Teams test immune cell therapies against Epstein Barr virus infected B cells in multiple sclerosis and collaborate to move treatments across the blood brain barrier to reach diseased cells. Clinicians combine imaging in the operating room, surgical tools, and research on biological age and the pace of aging to understand disease and guide treatment. Patient advocates describe challenges and hopes for better options, and contemporary art reflects on perception in digital and physical worlds. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 40992]