We usually think of the past as something that no longer exists. It happened — and then it disappeared. But modern physics challenges this intuition in a profound way.
In this video, we explore why the past may still exist — not as memory, but as structure.
Drawing on ideas associated with Leonard Susskind, this documentary examines how relativity and modern spacetime physics reshape our understanding of time. In Einstein’s framework, there is no universal “now.” What is past for one observer may be present or future for another, depending on motion and frame of reference.
This destroys the idea that the past vanishes.
In the spacetime view, the universe is a four-dimensional structure. Events are not erased — they are located. The past is not something that disappeared. It is something that exists in a different region of spacetime.
From this perspective, time does not flow in the way we imagine. The sense of disappearance comes from human experience, not from fundamental physics.
Optimus robots, with their rapidly advancing capabilities in AI and dexterity, are poised to revolutionize the field of surgery, potentially surpassing human surgeons in precision and accessibility within a few years and making traditional surgical expertise and even medical school obsolete.
## Questions to inspire discussion.
Healthcare Access & Economics.
🏥 Q: How will Optimus robots change healthcare costs and accessibility?
A: Optimus surgeon robots will operate at costs limited to capital expenditure and electricity, enabling deployment in rural villages and developing countries like Zimbabwe and throughout Africa, demonetizing and decentralizing access to medical care that will exceed what presidents currently receive.
We experience time as something that flows. Seconds pass. Moments disappear. The future becomes the present and then turns into the past.
But modern physics does not describe time this way.
In this video, we explore why time — as we intuitively understand it — may not exist at the fundamental level of reality.
Drawing on ideas associated with Leonard Susskind, this documentary examines how relativity and quantum physics challenge the idea of a flowing temporal river. Einstein’s theory removes the notion of a universal present. There is no global “now” that sweeps across the universe.
Without a universal present, the idea of time flowing becomes difficult to define physically.
In the relativistic picture, spacetime is a four-dimensional structure. Events are not created moment by moment. They are embedded in geometry. The equations of physics do not contain a moving present. They describe relations between events.
Want to make a career jump in 2026? If cybersecurity is on your radar, you’ll want to get prepared for the CISSP exam, one of the most prestigious credentials in the industry that signals you’re ready for high-level roles.
You don’t have to head back to school to get prepped for a cybersecurity career. The CISSP Security & Risk Management Training Bundle can prepare you in the comfort of your home. This bundle of eight courses teaches you how to protect computers, networks, and data from threats and helps you master the eight domains information security professionals should know.
Are we chasing the wrong goal with Artificial General Intelligence, and missing the breakthroughs that matter now?
On this episode of Digital Disruption, we’re joined by former research director at Google and AI legend, Peter Norvig.
Peter is an American computer scientist and a Distinguished Education Fellow at the Stanford Institute for Human-Centered Artificial Intelligence (HAI). He is also a researcher at Google, where he previously served as Director of Research and led the company’s core search algorithms group. Before joining Google, Norvig headed NASA Ames Research Center’s Computational Sciences Division, where he served as NASA’s senior computer scientist and received the NASA Exceptional Achievement Award in 2001.He is best known as the co-author, alongside Stuart J. Russell, of Artificial Intelligence: A Modern Approach — the world’s most widely used textbook in the field of artificial intelligence.
Peter sits down with Geoff to separate facts from fiction about where AI is really headed. He explains why the hype around Artificial General Intelligence (AGI) misses the point, how today’s models are already “general,” and what truly matters most: making AI safer, more reliable, and human-centered. He discusses the rapid evolution of generative models, the risks of misinformation, AI safety, open-source regulation, and the balance between democratizing AI and containing powerful systems. This conversation explores the impact of AI on jobs, education, cybersecurity, and global inequality, and how organizations can adapt, not by chasing hype, but by aligning AI to business and societal goals. If you want to understand where AI actually stands, beyond the headlines, this is the conversation you need to hear.
In this episode: 00:00 Intro. 01:00 How AI evolved since Artificial Intelligence: A Modern Approach. 03:00 Is AGI already here? Norvig’s take on general intelligence. 06:00 The surprising progress in large language models. 08:00 Evolution vs. revolution. 10:00 Making AI safer and more reliable. 12:00 Lessons from social media and unintended consequences. 15:00 The real AI risks: misinformation and misuse. 18:00 Inside Stanford’s Human-Centered AI Institute. 20:00 Regulation, policy, and the role of government. 22:00 Why AI may need an Underwriters Laboratory moment. 24:00 Will there be one “winner” in the AI race? 26:00 The open-source dilemma: freedom vs. safety. 28:00 Can AI improve cybersecurity more than it harms it? 30:00 “Teach Yourself Programming in 10 Years” in the AI age. 33:00 The speed paradox: learning vs. automation. 36:00 How AI might (finally) change productivity. 38:00 Global economics, China, and leapfrog technologies. 42:00 The job market: faster disruption and inequality. 45:00 The social safety net and future of full-time work. 48:00 Winners, losers, and redistributing value in the AI era. 50:00 How CEOs should really approach AI strategy. 52:00 Why hiring a “PhD in AI” isn’t the answer. 54:00 The democratization of AI for small businesses. 56:00 The future of IT and enterprise functions. 57:00 Advice for staying relevant as a technologist. 59:00 A realistic optimism for AI’s future.
Supriya Chakraborty might have been studying insects in a lab had it not been for an immunology college instructor in India who taught him about the superheroes inside him—immune cells that wage a battle against bacteria, parasites, and a host of other adversaries that invade our bodies. “That really fascinated me,” Chakraborty recalled. “My focus shifted from entomology to wanting to solve illnesses that affect humans, specifically neurodegenerative disorders.”
Zeynab Tabrizi would take quite a different path to studying conditions that damage and destroy parts of the human nervous system. She had long been a student of immunology and neuroscience in her native Iran, conducting research that explored the causes of disorders like schizophrenia and autism. “I had some experience working in industry,” she said, “but my heart was in academia.”
Now, their paths have intersected at the University of Miami. As Ph.D. students in the College of Arts and Sciences’ Department of Biology, Chakraborty and Tabrizi conduct research that could help blaze a trail to more effective treatments for Alzheimer’s disease, perhaps even leading to a cure for the memory-robbing disorder that affects more than 7 million older adults in the U.S.
Google has collaborated with African universities and research institutions to launch WAXAL, an open-source speech database designed to support the development of voice-based artificial intelligence for African languages.
African institutions, including Makerere University in Uganda, the University of Ghana, Digital Umuganda in Rwanda, and the African Institute for Mathematical Sciences (AIMS), participated in the data collection for this initiative. The dataset provides foundational data for 21 Sub-Saharan African languages, including Hausa, Luganda, Yoruba, and Acholi.
WAXAL is designed to support the development of speech recognition systems, voice assistants, text-to-speech tools, and other voice-enabled applications across sectors such as education, healthcare, agriculture, and public services.
Math anxiety is a significant challenge for students worldwide. While personalized support is widely recognized as the most effective way to address it, many teachers struggle to deliver this level of support at scale within busy classrooms. New research from Adelaide University shows how artificial intelligence (AI) could help address challenges such as math anxiety by using a student’s inputs and identifying signs of anxiety or disengagement during learning.
Published in npj Science of Learning,the study suggests that when AI systems are designed to use the right data and goals, they can adapt their responses to help counteract negative emotional experiences associated with math, before these feelings escalate.
Lead researcher Dr. Florence Gabriel says AI has the potential to transform how math anxiety is supported, by offering timely, tailored interventions that step through learning and build student well-being.
The last few weeks in longevity science have been absolutely unreal. In this episode of Longevity Science News, Emmett Short breaks down 5 bombshell breakthroughs that could reshape the future of human health in 2026 — including an FDA-approved trial aiming to reverse cellular aging, cancer vaccines eliminating brain tumors in days, the regeneration of human teeth, one-shot GLP-1 Ozempic-style gene therapies, and a shocking new discovery linking gut bacteria to multiple sclerosis.
These aren’t sci-fi predictions — these are real developments happening right now in clinical trials, biotech labs, and cutting-edge medical research. If you care about anti-aging, regenerative medicine, epigenetic reprogramming, cancer immunotherapy, GLP-1 weight loss drugs, or the future of human lifespan, this is the episode you don’t want to miss.
Hume Band 20% off with Code LSN20 https://humehealth.com/pages/hume-ban… Huma Band Review: • Best Fitness Tracker For Longevity: Hume B… JOIN LSN Patreon for exclusive access to news, tips and a community of like minded longevity enthusiasts: https://www.patreon.com/user?u=29506604 ✅ Chapters 00:00 – The Longevity Science Explosion 00:48 Hume Band 20% Off 01:02 – Exclusive Interviews 01:43 Bombshell #1: FDA Approves Age Reversal Trial (Yamanaka Factors) 04:40 – Bombshell #2: Cancer’s Worst Month Ever (Vaccines + Immunotherapy) 09:19 – Bombshell #3: The Regeneration Revolution (Cartilage, Teeth, Liver) 11:30 – Bombshell #4: The One-Shot Ozempic Gene Therapy 12:25 – Bombshell #5: Gut Bacteria Linked to Multiple Sclerosis 13:55 – Final Recap + What Breakthrough Comes Next? Links in Script David Sinclair FDA Trial Tweet https://twitter.com/davidasinclair/status/2 … FDA Greenlights Age Reset Trial (Endpoints) https://endpoints.news/exclusive-fda–… Life Biosciences Epigenetic Reprogramming Video • Reprogramming Human Life — Michael Ringel… mRNA Brain Cancer Vaccine Tweet
… ⚠️ Disclaimer: This video is for educational and informational purposes only and does not constitute medical advice. Consult a qualified clinician before making health or treatment decisions. 🔗 EXCLUSIVE INTERVIEWS & BONUS CONTENT Get extended conversations, deep dives, and behind-the-scenes research ans a YouTube Member Patreon: 👉 / u29506604 YT Membership: 👉 / @longevitysciencenews PRODUCTION CREDITS ⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺⎺ Executive Producer – Keith Comito @Retromancers Host, Producer, Writer – Emmett Short @emmettshort
Full huma band review: • best fitness tracker for longevity: hume B…
Precision Nutrition, Epigenetics & Practitioner-Led Longevity Care — Dr. Chris Oswald — Head of Medical Affairs, Pure Encapsulations, Nestlé Health Science.
Dr. Chris Oswald, DC, CNS, is Head of Medical Affairs for Pure Encapsulations (https://www.pureencapsulations.com/), part of Nestlé Health Science family. He is a chiropractor, certified nutrition specialist and certified functional medicine practitioner and has been treating patients since 2007.
At Pure Encapsulations, Dr. Oswald leads medical education, scientific strategy, and innovation across well-known professional brands including Pure Encapsulations, Douglas Labs, Klean Athlete, Genestra, and others. In this role, he sits at the intersection of clinical science, practitioner education, and product innovation — translating complex evidence into practical tools that help healthcare professionals practice more confident, personalized nutritional medicine.
Dr. Oswald’s clinical work, in combination with his work in professional dietary supplement companies, gives him unique insight into the creation of clinically useful tools and education to support the unique needs of clinicians and patients in functional, integrative and natural health.
Before joining Pure Encapsulations, Dr. Oswald held senior leadership roles across the nutraceutical and health tech landscape, including Chief Science Officer, Head of Product Innovation and R&D, Head of Operations, Interim Head of Sales, and VP of Nutraceuticals at companies like January AI and Further Food. Across those roles, he’s led everything from supply chain and regulatory strategy to product development, claims substantiation, and national practitioner education.
