Topology offers a way to organize complex data by looking for shape, structure, and relationships. Yusu Wang, Ph.D., UC San Diego, and Gunnar E. Carlsson, Ph.D., Stanford University, discuss how ideas from algebraic topology move from pure mathematics into data science, machine learning, and AI. Carlsson explains why topological data analysis helps identify meaningful groups in large data sets, how examples and accessible tools can make abstract math useful, and why interpretability matters as AI systems grow more complex. The conversation connects collaboration across fields, customer-focused entrepreneurship, and the need to train mathematicians and AI researchers to help formulate real-world problems. Their exchange shows how mathematical thinking can make powerful technologies more understandable, usable, and accountable. Series: "Data Science Channel" [Science] [Show ID: 41487]

Alzheimer’s disease can begin developing years before memory and thinking problems become noticeable. Iris Broce-Diaz, Ph.D., of UC San Diego is developing accessible, noninvasive, and cost-effective tools to help primary care physicians and neurologists identify people at higher risk earlier. Her models combine information from cognitive assessments, brain imaging, genetics, and PET scans to estimate the likelihood that mild cognitive impairment will progress within five years. Combining multiple measures improves the models’ ability to separate higher- and lower-risk patients. Broce-Diaz also plans to add women-specific factors, including menopause history, hormone therapy, reproductive history, endocrine markers, and symptoms. The goal is to support better referrals, guide monitoring, and help eligible patients consider treatment sooner. Earlier risk assessment could also strengthen clinical trials and make dementia care more useful across different health systems. Series: "Motherhood Channel" [Health and Medicine] [Show ID: 41632]

Men with non-obstructive azoospermia may undergo microscopic testicular sperm extraction, or mTESE, without knowing whether sperm will be found. Kun Tan, Ph.D., of UC San Diego explains how molecular semen analysis could provide a noninvasive way to predict the procedure’s outcome. The assay uses stage-specific germ cell markers identified through single-cell RNA sequencing, then measures those markers in semen with qPCR. Because semen contains germ cells from different stages of sperm development, their molecular signals may reflect what is happening inside the testes. Tan shows how the assay predicts whether sperm retrieval was successful and can identify where sperm development may be blocked. The research could help couples planning IVF or ICSI avoid unnecessary surgery, reduce financial and emotional burdens, and receive more detailed information about male infertility before treatment.

Series: "Motherhood Channel" [Health and Medicine] [Show ID: 41630]

Archaeology can help communities understand environmental change, protect cultural heritage, and prepare for an uncertain climate future. Isabel C. Rivera-Collazo, Ph.D., of UC San Diego studies relationships among people, oceans, coastal ecosystems, and climate in Puerto Rico and the Caribbean. She explains how Hurricane Maria shifted her research from identifying theoretical vulnerabilities to supporting communities facing immediate risks. Her work combines archaeology with ecology, biology, geology, local histories, and community knowledge. Research on plants, fishing traditions, coral reefs, and coastal sites has supported sand dune restoration, heritage protection, and the creation of a marine protected area. Rivera-Collazo emphasizes that residents are experts on their own landscapes and should guide research priorities. Recovering knowledge from the past can strengthen identity, support ecosystem restoration, and help communities shape more resilient futures. Series: "Mi Universidad " [Science] [Education] [Show ID: 41490]

Chronic pain in older adults can affect mobility, mood, sleep, social connection, and independence. Una Makris, M.D., M.Sc., UC San Diego and VA San Diego Healthcare System, explains why musculoskeletal pain is common later in life and why medications or procedures alone may not meet the needs of many patients. Drawing on her work in rheumatology and geriatrics, Makris describes how pain and depression can reinforce each other, making it important to address both together. She highlights an age-friendly behavioral coaching approach that uses motivational interviewing, values-based goal setting, physical activity, and social support to help people reconnect with meaningful activities. By focusing on small, safe increases in movement, this research points to practical ways to support better function, quality of life, and healthy aging. Series: "Stein Institute for Research on Aging" [Health and Medicine] [Show ID: 41172]

Scientific progress depends on curiosity, investment and the freedom to take risks. Nobel Laureate and UC San Diego alumnus Fred Ramsdell traces his path from community college to biotechnology and a discovery that reshaped understanding of immune regulation. He explains how decades of publicly funded research made that breakthrough possible and why failed experiments are essential steps toward discovery. Ramsdell discusses threats to federal research funding, the private sector’s limited tolerance for risk and the need for scientists to communicate clearly. Rebuilding trust, he argues, starts with listening, finding shared values and explaining how basic research leads to new treatments, economic value and national security. Sustained support for science matters because no one can predict where the next major breakthrough will begin.

Series: "Deep Look Public Speaker Series" [Science] [Show ID: 41113]

Art can connect personal history, community, and social change. Janelle Iglesias, Assistant Professor of Studio Art at UC San Diego, traces her path from a multicultural childhood in Queens to anthropology, ceramics, sculpture, and public art. She explains how objects in her family home sparked an interest in material culture, and how a reconciliation program in South Africa changed her view of what artists can contribute to society. Iglesias also describes nearly two decades of collaboration with her sister Lisa through Las Hermanas Iglesias, including projects involving their mother. Her teaching emphasizes play, curiosity, resourcefulness, and the idea that sculpture can be made from almost anything. By linking creative practice with care, connection, and community, Iglesias shows how art can help people respond to uncertainty and imagine more equitable futures. Series: "Education Channel" [Arts and Music] [Education] [Show ID: 41254]

With the success of Artemis II, NASA is preparing for humanity’s return to the Moon through the ambitious Artemis Project. In this lecture, Professor Neil Farber explores the future Artemis missions, the spacecraft and technologies designed to support them, and the challenges NASA faces in sending astronauts back to the lunar surface. Building on the legacy of the Apollo program, Artemis represents a new era of exploration focused not only on reaching the Moon, but on establishing a sustainable long-term presence and preparing for future missions to Mars. Professor Farber examines why returning to the Moon today presents more difficulties than during the Apollo era, including modern engineering demands, funding realities, mission complexity, astronaut safety, and the logistical challenges of deep space travel. The lecture also highlights how NASA’s goals have evolved since Apollo and why the Moon remains central to the future of human space exploration. Series: "Osher UC San Diego Distinguished Lecture Series" [Science] [Show ID: 41597]

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]

Rome survived for 2,000 years. Edward Watts explores the long history of the Roman state and the lessons it offers for the modern world. From its beginnings as a small Italian city-state to its transformation into a Christian empire centered in Constantinople, Rome maintained a remarkable sense of political continuity across centuries of cultural and religious change. Watts examines how Roman institutions adapted over time and how the Fourth Crusade and capture of Constantinople ultimately destroyed the foundations that sustained the state for generations. Watts highlights the importance of resilient institutions and the dangers of disrupting the systems that preserve political stability and continuity. Series: "Osher UC San Diego Distinguished Lecture Series" [Public Affairs] [Humanities] [Show ID: 41602]