Afleveringen
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Human brain organoids help researchers study neurodevelopmental disorders that are difficult to examine directly in developing brain tissue. Giorgia Quadrato, USC, uses cortical organoids derived from human pluripotent stem cells to examine SYNGAP1, an autism risk gene associated in the transcript with intellectual disability, epilepsy, and global developmental delay. Quadrato describes how SYNGAP1 appears in progenitor cells as well as neurons, and how SYNGAP1 haploinsufficiency is linked to disrupted radial glia organization, altered cell division, and faster maturation of cortical projection neurons. She also discusses newer work focused on enteric neurons, gastrointestinal symptoms, and gut motility. By connecting brain development, autism genetics, and the enteric nervous system, this research points to models that may help test therapies and better understand symptoms that affect families. Series: "Autism Tree Project Annual Neuroscience Conference" [Health and Medicine] [Science] [Show ID: 41174]
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As chatbots trained on Large Language Models become more sophisticated, their responses can sometimes seem uncanny, as if they come from a source that is mysterious, inexplicable, or even divine. Webb Keane, Professor of Anthropology at the University of Michigan, examines what happens when people treat artificial intelligence as a kind of “metahuman.” He explains how this reflects a broader human tendency to project authority onto technologies we do not fully understand. Keane explores how that sense of authority emerges through social interaction, and how the unequal ways humans and metahumans address one another can make AI’s power feel intuitively real. Series: "Ethics, Religion and Public Life: Walter H. Capps Center Series" [Humanities] [Science] [Show ID: 41542]
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Zijn er afleveringen die ontbreken?
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Hard optimization problems often look impossible through worst-case analysis, but real-world problems can contain structure that helps algorithms work faster. Ellen Vitercik, Ph.D., of Stanford University explains how machine learning can improve algorithm design for NP-hard optimization problems while preserving the formal guarantees that make solvers useful. She discusses beyond worst-case analysis, problem-specific heuristics, and the gap between tools that perform well in practice and methods that prove optimality. Vitercik also describes research on LLM reasoning using data structure tasks, where answers can be checked programmatically and failures reveal when models rely on pattern matching rather than true generalization. Her work helps clarify how AI may support stronger algorithms, more useful benchmarks, and more reliable reasoning systems. Series: "Data Science Channel" [Science] [Show ID: 41179]
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Heart regeneration faces two connected challenges: replacing lost muscle and keeping transplanted cells safe and accepted by the body. Charles Murry, M.D., Ph.D., of USC explains why the adult heart heals major cardiomyocyte loss with scar tissue rather than new muscle, leading to progressive heart failure. Murry describes how stem cell derived cardiomyocytes can be manufactured at scale, transplanted into injured hearts, and tested for function in animal models. He also examines major barriers, including graft related arrhythmias, calcium handling stress, immune rejection, and the need for practical immunosuppression or immune edited cells. By connecting cell manufacturing, electrophysiology, immunology, and clinical trial planning, this research shows why heart regeneration is difficult and why careful translation matters for patients with severe heart injury. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 40853]
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Hematopoietic stem cells make blood across the lifespan, but they do not all behave the same way. Stephanie Xie, Ph.D., Scientist at Princess Margaret Cancer Centre, University of Toronto, examines how these rare cells self-renew, differentiate, and respond to inflammatory stress, asking whether differences in the stem cell pool help explain why aging affects people so differently. Xie identifies two hematopoietic stem cell subsets, including one that retains inflammatory memory after stress recovery, and connects this state to aging, clonal hematopoiesis, sickle cell disease, post-COVID recovery, and mortality risk markers in blood. Her research also raises questions about whether targeting the inflammatory environment, including through GLP-1 receptor agonists or metformin, could help mitigate clonal hematopoiesis. Understanding these patterns could clarify how inflammation shapes blood production, cancer risk, and immune health over time. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41406]
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Rare disease research is creating new paths for diagnosis, treatment, and broader medical discovery. Gene therapy can repair or replace faulty genes, and work on cystinosis has led to a stem cell platform now being applied to Danon disease, Sanfilippo syndrome C, Friedreich’s ataxia, and Alzheimer’s research. Funding programs support gene therapy, clinical trials, and new platform approaches for rare diseases. CAR-T cell research is also advancing treatment possibilities for pediatric brain tumors, including early results in children with DIPG and diffuse midline glioma. A patient advocate shares her daughter’s diagnostic odyssey and treatment for TUBB4A leukodystrophy. Together, these stories show why rare disease research matters beyond rarity. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41402]
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Health data affects artificial intelligence in important ways. Camille Nebeker, Ed.D., M.S., UC San Diego, explains why ethically sourced data is foundational to building trustworthy, AI-ready health data repositories. Nebeker examines how ethical sourcing applies across the full data lifecycle, including consent, governance, transparency, data quality, privacy, stewardship, and community engagement. She also shows how ideas from supply chain management and value sensitive design help teams identify ethical tensions and improve decision-making. This work helps explain why ethics cannot be added at the end of AI development and points toward more accountable data practices that support public trust and stronger downstream performance. Series: "Exploring Ethics" [Science] [Show ID: 41368]
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Pre-cancer and cancer can begin when stressed blood-forming stem cells lose their normal controls. Catriona Jamieson, M.D., Ph.D., UC San Diego, explains how inflammation-linked editing enzymes, repetitive elements in the genome, and stem cell stress shape the progression from myeloproliferative neoplasms to acute myeloid leukemia. Jamieson examines how spaceflight accelerates stem cell aging, how some astronauts mobilize a resilient regenerative stem cell population, and how tumor organoids in space help reveal drug responses by activating the enzyme ADAR1. This work helps explain how cancer starts, why it can return, and how space-based research may speed the development of therapies that stop malignant stem cells before disease advances. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41473]
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Space healthcare depends on connected health data that can follow people wherever care happens. Peter DeVault, Epic, explains how electronic health record tools built for hospitals, labs, and patients can also support healthcare in space. DeVault describes patient-facing tools like MyChart, interoperability across health systems, structured genomics and pharmacogenomics in the patient record, and Cosmos, Epic’s patient data aggregation platform with about 300 million longitudinal records. He also examines AI capabilities that can generate possible future health scenarios and expand to telemetry and molecular data collected before, during, and after a mission. This work helps explain how records, data sharing, and predictive tools could support astronaut health and resilience and why those capabilities may be necessary for the future of space medicine. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41481]
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Brain aging and disease research can gain new insights from space. Aline M.A. Martins, Ph.D., UC San Diego, explains how neuroscience studies in space use brain organoids, proteomics, and single-cell analysis to understand cognition decline, space-induced neurosenescence, and disease-related changes. Martins examines molecular markers of senescence, mitochondrial impairment, and neuroinflammation in organoid models, including Rett syndrome, while also comparing how space affects organoids of different ages. She shows that space can accelerate aging-related changes and affect cell types differently, helping clarify how space biology may speed drug discovery and reveal biomarkers for disease. This work helps explain how space research can inform treatments on Earth and points toward faster preclinical testing and broader understanding of brain disease.
Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41478] -
Environmentalist and author Bill McKibben has helped shape how the world understands climate change. In this conversation with Marco Werman, host of The World, McKibben offers a clear-eyed look at the climate crisis and the solutions that could help reduce the damage of a warming planet.
As part of the Burke Lectureship at UC San Diego, McKibben also explores the moral and spiritual questions at the heart of climate change. More than three decades after The End of Nature brought climate change to a broad audience, his work continues to connect science, ethics, and grassroots action, including the global climate campaign 350.org and the fossil fuel divestment movement. Series: "Burke Lectureship on Religion and Society" [Humanities] [Science] [Show ID: 41265] -
How does global warming connect to the extreme weather people experience close to home? Drawing on the work of the Weather Extremes and Climate Impacts Analytics group, Sasha Gershunov of Scripps Institution of Oceanography outlines the accelerating warming trend, the role of fossil fuels and carbon dioxide, and the greenhouse effect, and how it relates to extreme weather. He also traces key milestones in climate science, including the long-term carbon dioxide measurements begun by Charles David Keeling. The discussion then turns to how climate change may affect heat waves, floods, droughts, storms, wildfires, and sea level rise. Series: "Osher UC San Diego Distinguished Lecture Series" [Science] [Show ID: 41412]
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Microgravity can change biological systems in ways that may open new paths for biomedical research and commercialization in space. Twyman Clements, Space Tango, explains how “middleware” helps connect research use cases with space infrastructure by adapting terrestrial processes and supply chains for a spaceflight environment. Clements examines how long-duration microgravity creates different physical conditions, how Space Tango packages experiments into flight-ready lab systems, and how commercial space stations and reentry systems could help increase scale, throughput, and production value. He also points to more robotic systems that could support on-orbit sampling, imaging, and experiment assembly. This work helps explain how space-based biomedical research could move beyond small experimental missions and toward more practical, scalable platforms for discovery and development Series: "Stem Cell Channel" [Science] [Show ID: 41480]
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Stem cell health in space matters for astronaut health and cancer research. Jessica Pham, UC San Diego, explains how spaceflight shapes normal hematopoietic stem cells and cancer stem cells through nano bioreactor studies, astronaut blood analysis, and tumor organoid work in low-Earth orbit. Pham examines increased cycling and reduced dormancy in space, reduced self-renewal after return, and ongoing research on cancer stem cells and their microenvironment, helping clarify how stem cells respond to spaceflight. This work helps explain how space conditions may change stem cell fitness over time and points toward a better understanding of astronaut health, long-duration missions, and cancer stem cell behavior. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41477]
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Privacy-preserving computation can help hospitals and researchers use sensitive health data without exposing it. Farinaz Koushanfar, Ph.D., UC San Diego, explains how secure computation and distributed learning make it possible to collaborate on medical data while protecting patient privacy. Koushanfar examines secure multi-party computation, zero-knowledge proofs, and federated and split learning, helping clarify how health systems can work together despite data silos, incompatibility, security threats, and re-identification risk. This work helps explain how medical AI can learn from private data more safely and points toward more secure, robust, and trustworthy healthcare systems. Series: "Exploring Ethics" [Health and Medicine] [Humanities] [Science] [Show ID: 41367]
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Computer-based assessment can change how students practice, test, and learn. Craig Zilles, Ph.D., University of Illinois Urbana-Champaign, explains how PrairieLearn supports mastery-oriented teaching through immediate feedback, auto-grading, randomized question generators, and repeat practice. Zilles examines asynchronous exams, frequent small tests, retake opportunities, and question banks designed around specific learning objectives, helping clarify how assessment systems can reduce administrative overhead while giving students more chances to demonstrate learning. He also discusses fairness in randomized exams, the balance between auto-grading and manual grading, and the emerging role of AI in formative feedback. This work helps explain how digital testing tools can support flexible assessment without forcing instructors to simplify what they teach. Series: "Computer Science Channel" [Science] [Education] [Show ID: 41409]
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Architect Drew Hubbell explores the intersection of sustainable design and architectural artistry, highlighting how thoughtful, aesthetically rich structures can also embody strong environmental principles. He presents several recent projects, with particular attention to their fire-resistant strategies and materials. Against the backdrop of increasingly destructive wildfires across California, Hubbell addresses the urgent need for resilient design. He discusses practical approaches and innovative ideas for architects, designers, and homeowners seeking to build, or rebuild, with fire in mind. Drawing on his professional experience, he offers clear insights to help audiences make informed, forward-thinking decisions about creating homes that are both beautiful and better equipped to withstand fire. Series: "Osher UC San Diego Distinguished Lecture Series" [Science] [Show ID: 41530]
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Artificial intelligence affects how we understand the behavior of machine learning systems. Stefano Soatto, VP of Applied Science, Amazon Web Services, explains how ideas from information geometry shape emerging theories of how these artifacts work. Soatto examines the natural gradient, the connections between geometry and concepts such as probability distributions, entropy, mutual information, and KL divergence, and the challenge of defining information in trained models, helping clarify how reasoning and learning can be understood in the era of AI. Series: "Kyoto Prize Symposium" [Science] [Show ID: 41494]
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Youth mental health is increasingly shaped by how teens use AI for emotional support outside clinical care. Cinnamon Bloss, Ph.D., UC San Diego, explains how growing use of conversational AI reflects major gaps in care and changing preferences for support. Bloss examines the appeal of AI’s accessibility and nonjudgmental responses, concerns about replacing human connection, and the need to monitor harms, helping clarify how AI fits into a fast-changing mental health landscape. She also points to the importance of listening to young people, improving AI credibility and transparency, expanding safety and privacy discussions in schools, and preparing clinicians and online safety workers for this new reality. This work helps explain why teens are turning to AI and points toward a more thoughtful balance between safety and access to mental health support. Series: "Exploring Ethics" [Health and Medicine] [Science] [Show ID: 41366]
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Brain aging and neurological disease are hard to study because living human brain tissue is difficult to access. Alysson Muotri, Ph.D., UC San Diego, explains how brain organoids sent to space can model accelerated aging, reveal changes in neural networks, and help test potential treatments for brain disorders. Muotri examines space-induced senescence, fragmented network activity linked to dementia and Alzheimer’s patterns, and Rett syndrome findings showing inflammation tied to endogenous retroviruses and response to antiretroviral drugs in preclinical models. He also explores using brain organoids in space to screen neuroprotective compounds, including candidates identified from Amazon plants. This work helps explain how space biology can speed research on autism, Rett syndrome, Alzheimer’s disease, and other neurological conditions, and points toward new ways to test therapies on Earth. Series: "Stem Cell Channel" [Health and Medicine] [Science] [Show ID: 41475]
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