Learn Something

Lifelong Learning University
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Welcome to "Learn Something" — the podcast that feeds your curiosity one episode at a time. Whether it’s unraveling the mysteries of space, diving into the roots of world religions, exploring economic concepts, or decoding the latest in technology, each episode brings you a fresh, bite-sized journey into a fascinating topic. No fluff, no jargon — just engaging, accessible knowledge across a wide range of subjects. Tune in, expand your horizons, and learn something new every time you listen.

  1. HÁ 6 H

    CRISPR: Editing the Code of Life

    In 2024, a Philadelphia infant became the first person treated with a gene therapy custom-designed for his individual genome - built and delivered in just six months. This episode is the story of the technology that made that possible: CRISPR. CRISPR started not in a biotech lab but in bacteria. Bacteria store fragments of past viral invaders in their own genome, giving them a kind of molecular memory. A protein called Cas9 uses that memory to find and destroy returning viruses. In 2012, researchers Jennifer Doudna and Emmanuelle Charpentier showed you could repurpose Cas9 with a custom guide to cut any DNA sequence you choose, setting off one of the fastest bench-to-bedside translations in the history of medicine. The basic edit works by cutting the DNA at a specific spot and providing instructions for what to write in its place. You can knock out a harmful gene, swap in a corrected version, or change a single genetic letter. Newer tools called base editors and prime editors skip the cut step and make smaller, cleaner changes - together covering an estimated 89 percent of known disease-causing mutations. Non-cutting variants can also turn a gene up or down without permanently altering the DNA. As of 2026, more than 250 clinical trials are running worldwide. The first approved CRISPR-based drug is reaching patients with sickle cell disease, and researchers are working on inherited blindness, certain cancers, and other conditions that were previously untreatable. Getting the editing tools into the right cells has long been a challenge, but a delivery method borrowed from COVID-19 mRNA vaccines has become reliable and accelerated progress considerably. This episode covers the science, the clinical milestones, and the safety questions that still need answering.

    25 min

  2. HÁ 3 DIAS

    Nuclear Power: Reimagined for the Future

    The world's nuclear plants set a record in 2024, generating more electricity than in any previous year while helping avoid 2.1 billion tonnes of carbon dioxide emissions. At the same time, the United States is moving to license new reactor designs for the first time in decades - designs that work very differently from the plants built in the 1970s. At its core, a nuclear reactor does the same thing as a coal or gas plant - it makes heat, boils water, and spins a turbine to generate electricity. The heat source is what is different. Inside the reactor, a controlled chain reaction splits uranium atoms and releases enormous amounts of heat. That heat is transferred to water in a sealed loop, which eventually becomes steam that drives the turbine. The reactor itself stays separate and contained throughout the process. The biggest change in newer designs is how they handle emergencies. Older reactors depended on pumps, backup generators, and operator decisions to keep the core cool when something went wrong. Fukushima in 2011 showed the consequences when those systems failed. Three reactors melted down after a tsunami knocked out the backup power. Newer designs use what engineers call passive safety: gravity, convection, and the natural behavior of materials do the cooling instead of pumps. Westinghouse's AP1000 uses a water tank positioned above the reactor so that if power fails, water falls and heat rises, keeping the core safe for 72 hours without any pumps running. Two newer concepts are moving through U.S. licensing right now. Small modular reactors produce roughly a third of the electricity of a full-size plant, but they are manufactured in factories and shipped to site in sections rather than built on site over a decade. That makes them faster to deploy and easier to scale. Molten salt reactors dissolve the nuclear fuel into a liquid salt mixture rather than solid rods and operate at normal atmospheric pressure. If power is lost, the fuel drains by gravity into a storage tank and the reaction stops on its own. This episode covers the basics of nuclear power, from how chain reactions work to the new reactor designs currently moving through U.S. regulatory approval.

    27 min

  3. HÁ 4 DIAS

    Antibiotic Resistance: The Crisis and the Solutions

    Antibiotics have saved hundreds of millions of lives since Alexander Fleming spotted a mold killing bacteria in a Petri dish in 1928. But bacteria fight back, and right now antibiotic resistance is killing more than a million people a year, with projections putting the cumulative death toll at 39 million or more by 2050. This episode starts with the basics: how antibiotics actually work by targeting structures that bacteria have and human cells do not, like cell walls and certain protein-building machinery. Then we get into how bacteria push back. Some produce enzymes that destroy the drug before it can act. Others run molecular pumps that flush the antibiotic back out of the cell. Still others just mutate the target so the drug has nothing to grab onto. MRSA is one of the most recognized examples of that last trick. The history here matters too. There was a "golden age" of antibiotic discovery from roughly 1944 to 1966, when researchers pulled dozens of useful compounds out of soil bacteria. About half the antibiotics in use today came from that twenty-year window. Then the pipeline stalled. Drug companies found the economics unfavorable compared to treatments people take for decades, and for roughly thirty years, almost no genuinely new antibiotic classes reached patients. The last truly new class approved was daptomycin in 2003. The episode also covers what scientists are trying now - phage therapy, which uses viruses that naturally prey on bacteria, antimicrobial peptides that punch through bacterial membranes, and AI-assisted drug discovery aimed at finding compounds that have been hiding in plain sight in large chemical databases. None of these are silver bullets yet, but each represents a real and active line of research. This episode is for anyone who wants to understand one of the biggest public health challenges of the next few decades before it dominates the headlines even more than it already does.

    25 min

  4. HÁ 5 DIAS

    The Science of Sleep: Beyond Eight Hours

    Most of us have heard we need eight hours of sleep, but that number only tells part of the story. What actually happens inside your body and brain during those hours turns out to be a lot more intricate than a simple timer running down. Sleep is not one continuous state - it is a series of repeating cycles, each lasting about 90 to 120 minutes, made up of distinct stages. Early in the night, your body spends more time in deep slow-wave sleep, which is when physical repair happens, growth hormone is released, and your immune system does some of its most important work. Later cycles shift toward REM sleep, where your brain is nearly as active as when you are awake. That is when memories get consolidated, emotions get processed, and the learning from the day before gets locked in. Skipping or cutting short any one of those stages has real consequences. Poor slow-wave sleep can leave you exhausted even after seven or eight hours in bed. Not enough REM sleep tends to show up as mood problems and trouble concentrating. This episode walks through what each stage is doing, why the timing across the night matters, and what researchers have learned about how sleep affects metabolism and immune function specifically. There is also a genetics angle that has gotten more attention recently. Not everyone runs on the same clock, and the science now supports the idea that some variation in how much sleep people need and when they feel alert is genuinely biological, not just a habit or a preference. This episode is for anyone who sleeps - which is everyone - and wants to understand what is actually going on.

    22 min

  5. HÁ 6 DIAS

    How Glass is Made and Used

    Glass is one of those materials that surrounds us every day - in windows, bottles, phone screens, and fiber optic cables - but most people have no idea how it actually gets made. This episode walks through the full story, from raw materials to finished product. The basic recipe for glass has not changed much in thousands of years. Silica sand is the main ingredient, but on its own it melts at around 1700 degrees Celsius, which is too energy-intensive to be practical. Manufacturers add soda ash to bring that temperature down, then limestone to keep the glass from dissolving in water. Recycled glass, called cullet, gets mixed in too because it melts faster and cuts energy costs. The blend goes into a furnace, and what comes out is a glowing, workable liquid that can be shaped in several different ways. Flat glass - the kind used in windows and buildings - is made through the float process, where molten glass is poured onto a bath of liquid tin. The glass spreads out, floats on top, and cools into a smooth, even sheet. Bottles and jars take a different route: a blob of molten glass gets pressed into a mold and then blown into shape by compressed air. Safety glass involves either heating and rapidly cooling the glass to build internal stress (tempered glass, which is four to five times stronger than regular glass), or sandwiching a plastic layer between two sheets so the whole thing holds together if it breaks. That plastic interlayer is why your car windshield cracks but does not cave in on you. Beyond the everyday stuff, there are types of glass built for specific jobs. Borosilicate glass - what lab equipment and Pyrex cookware are made from - can handle sudden temperature changes without cracking. Low-emissivity coatings on window glass reduce heat transfer, which is a big part of how modern buildings manage energy use. And the glass inside fiber optic cables is pure enough that light can travel through dozens of miles of it without fading significantly. Glassmaking dates back to at least 3600 BCE, and the invention of the blowpipe around the 1st century BCE is what made it affordable enough for ordinary people to own glass objects. If you use glass every day without thinking much about it, this episode gives you the basics of where it comes from and why different versions of it behave so differently.

    23 min

  6. 16/04/2025

    PFAS: The “Forever Chemicals” in Our Lives

    In this eye-opening episode of Learn Something, we explore the science, scope, and serious health concerns surrounding PFAS — commonly known as “forever chemicals.” These synthetic compounds, found in everything from nonstick cookware and waterproof clothing to fast food packaging and firefighting foam, are making headlines for a reason: they don’t break down easily, they accumulate in the environment and our bodies, and they’re everywhere. We break down what PFAS actually are — a massive family of over 4,000 manmade chemicals with super-strong carbon-fluorine bonds — and why their water-, oil-, and stain-resistant properties made them attractive to over 200 industries. But those same properties also make PFAS incredibly persistent and nearly impossible to eliminate once released. You’ll learn how PFAS enter our bodies through contaminated drinking water, food, dust, and direct product exposure — and how they bioaccumulate, even transferring from mother to baby. We also cover the alarming health risks, including thyroid and kidney dysfunction, weakened immune response, reproductive issues, and increased cancer risks. The episode explores what individuals can do to limit exposure — from choosing PFAS-free cookware and products to using certified water filters — while emphasizing that meaningful change must come through regulation, corporate accountability, and scientific innovation. We also dive into the complexities of detection, cleanup, and the troubling trend of “regrettable substitution,” where harmful PFAS are swapped with equally risky alternatives. Whether you’ve just heard of PFAS or have been following the headlines, this episode equips you with the knowledge to make safer choices and advocate for a cleaner, healthier future.

    16 min

  7. 15/04/2025

    Global Tariffs: Impacts and Policy Analysis

    In this episode of Learn Something, we unpack one of the most talked-about yet misunderstood tools in global economics: tariffs. From toll-like border taxes to powerful instruments of trade policy, tariffs have evolved dramatically — and their impact reaches far beyond the ports where goods arrive. We begin with the basics: What are tariffs, and how do they work? Listeners get a clear breakdown of specific tariffs (flat fees per item) and ad valorem tariffs (percentage-based rates), along with how governments set and track them through standardized systems like the Harmonized Tariff Schedule. But tariffs aren’t just economic footnotes — they’re strategic levers. We explore why countries use them: to raise revenue, protect emerging industries and jobs, influence foreign policy, and even shield consumers from low-quality imports. Yet behind these intentions lie complex consequences. We dive into the economic ripple effects: higher prices for consumers, supply chain disruptions, decreased competitiveness, and even job losses in industries the tariffs were meant to help. Real-world examples — including the U.S. steel and tire tariffs — highlight how policies intended to protect can backfire. You'll also learn how economists measure protectionism using simple averages, trade-weighted averages, and rates on dutyable goods — each with its limitations. And we don’t stop at tariffs. This episode touches on quotas, subsidies, and the broader web of trade barriers. From trade wars and retaliatory tariffs to geopolitical strategy and domestic tensions, we show how tariffs can shape — and shake — the global economy. Whether you're a business owner, policy enthusiast, or curious consumer, this episode reveals how a tax at the border can hit your wallet at home.

    17 min

  8. 14/04/2025

    The Case For Pluto: Defining Planets

    In this episode of Learn Something, we unravel the fascinating story of Pluto — its rise, fall, and the controversy that still surrounds it. Once known as the ninth planet in our solar system, Pluto captured the imagination of generations before being reclassified as a “dwarf planet” in 2006. But why did this happen, and why is the debate still ongoing? We trace Pluto’s journey from its discovery by Clyde Tombaugh in 1930 to its demotion by the International Astronomical Union (IAU). The game-changing moment came with the discovery of other large Kuiper Belt Objects like Eris, prompting astronomers to rethink what makes a planet a planet. The IAU’s new definition required that a planet orbit the sun, be nearly round, and crucially, clear its orbital neighborhood — a criterion Pluto failed due to its crowded Kuiper Belt location. But the story doesn’t end there. Prominent scientists like Alan Stern and Philip Metzger argue that Pluto should be a planet based on its rich geological complexity — including an atmosphere, methane glaciers, and potential subsurface oceans. They suggest planetary classification should focus more on what an object is rather than where it orbits. We also explore how cultural sentiment, evolving science, and powerful images from NASA’s New Horizons mission have kept Pluto in the public eye. The episode dives into the broader implications of redefining planets, the politics of scientific classification, and how even historical accidents can shape what we teach and believe. Whether Pluto is a planet, dwarf planet, or something in between, its story is a powerful example of how science evolves — and how curiosity continues to drive discovery.

    16 min
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Sobre

Welcome to "Learn Something" — the podcast that feeds your curiosity one episode at a time. Whether it’s unraveling the mysteries of space, diving into the roots of world religions, exploring economic concepts, or decoding the latest in technology, each episode brings you a fresh, bite-sized journey into a fascinating topic. No fluff, no jargon — just engaging, accessible knowledge across a wide range of subjects. Tune in, expand your horizons, and learn something new every time you listen.

Informações

  • Criado por
    Lifelong Learning University
  • Anos de atividade
    2025 - 2026
  • Episódios
    17
  • Classificação
    Livre
  • Copyright
    © Lifelong Learning University
  • Site do podcast
    Learn Something