What if the most fascinating topics in science, history, and culture could be explained in the time it takes to make a coffee?
Explained in Under 10 Minutes brings together six voices from around the world — a science teacher from Melbourne, a financial journalist from Cape Town, a museum curator from Dublin, a GP from Glasgow, a literature scholar from Mumbai, and an environmental advisor from Wellington — to tackle one big topic per episode. No jargon. No fluff. Just genuine curiosity, sharp insight, and real conversation. A new episode every week.
What Are Public Holidays — and Where Do They Come From? | Explained in Under 10 Minutes
Why do we all stop work on the same day? Not the same kind of day — the exact same date, coordinated across an entire country, sometimes the entire world? Lewis opens there, and Neev answers immediately: public holidays are a society's autobiography written in time off. At their peak, the Romans had over a hundred feriae — official days when ordinary business was suspended — tied to agricultural cycles, religious observance, and political commemoration.
Emma traces the word "holiday" itself: "holy day," a day set apart for sacred purpose. The secular modern holiday descends directly from religious observance. Bastille Day established in 1880, the Fourth of July not declared a federal holiday until 1870 — nearly a century after the Declaration. The deliberate construction of collective memory. Then the contested cases: Australia Day on January 26th marking the arrival of the First Fleet in 1788, a celebration for the majority and an "Invasion Day" for Aboriginal and Torres Strait Islander Australians whose cultures existed for 60,000 years before that date. Juneteenth — celebrated in Black American communities for 150 years before becoming a federal holiday in 2021. What gets elevated to official recognition reveals who holds power. Lewis covers the economics that surprise people: holidays are often net positive for retail, hospitality, and tourism. Countries with generous holiday allowances — France, Germany, Scandinavia — consistently rank among the world's most productive economies.
Lewis ends with the coordination insight that's most underrated: a public holiday only works as a social phenomenon because everyone stops simultaneously. There's genuine value in collective pause — the whole country being quiet on the same day. The question is always whose calendar, whose history, whose story the holiday tells. And the answers are never settled. They're renegotiated by every generation.
If you enjoyed this episode, please subscribe — and send your topic suggestions to podcast@under10.org. We read every one.
4 Jun 2026
What Is the Metaverse? | Explained in Under 10 Minutes
In 2021, Mark Zuckerberg renamed Facebook to Meta and announced he was betting the whole company on something called the metaverse. He has spent roughly fifty billion dollars on it since. Lewis opens there — and adds that Meta's flagship product, Horizon Worlds, famously had no legs on its avatars for years.
Emma traces the concept properly. The word comes from Neal Stephenson's 1992 novel Snow Crash — a satirical dystopia where people escape a collapsed physical reality by plugging into a shared virtual city. Zuckerberg apparently read it as an instruction manual. Neev covers what actually worked: Second Life's functioning virtual economy in 2003, Travis Scott's Fortnite concert in 2020 with twenty-seven million simultaneous attendees, Roblox paying out over seven hundred million dollars to creators in 2023. Then the NFT land bubble — people paying millions for virtual plots in worlds with daily active users sometimes numbering in the low hundreds. Emma tried a VR headset demo standing on the edge of a virtual skyscraper. Her hands were shaking. She was in someone's living room.
Lewis ends with what's actually working. Boeing, Siemens, and BMW are building complete digital twins of factories — simulate changes before implementing them, train workers virtually, run stress tests. Medicine is planning complex surgeries on a patient's own scanned anatomy before touching them. The industrial metaverse, unglamorous and commercially real. Then the question that has always been there underneath: when you can construct any reality, what do you choose to construct? And what happens when the constructed version is more appealing than the actual one? Lewis's answer: perhaps we should work on making actual reality more appealing first.
If you enjoyed this episode, please subscribe — and send your topic suggestions to podcast@under10.org. We read every one.
4 Jun 2026
What Is Quantum Mechanics? | Explained in Under 10 Minutes
Richard Feynman — one of the greatest physicists who ever lived — once said: if you think you understand quantum mechanics, you don't understand quantum mechanics. Lewis opens there, and Emma corrects him immediately: that actually means you understood it correctly.
Emma takes the double-slit experiment first — fire electrons at a barrier with two slits, and instead of two neat lines you get an interference pattern, as if each electron went through both slits at once. She traces the wave function, the measurement problem, Heisenberg's uncertainty principle — not a limitation of instruments but a fundamental feature of reality. Particles genuinely don't have both a precise position and a precise momentum at the same time. Neev draws the connection to Buddhist dependent origination; physicists have noticed the resonance too. Schrödinger's cat follows — and Emma notes that Schrödinger devised it as a sarcastic reductio ad absurdum, mocking the Copenhagen interpretation. The physics community adopted it as a genuine teaching tool, which he found deeply irritating.
Lewis closes with entanglement and the many-worlds interpretation. Bell's theorem — tested experimentally since the 1970s — confirmed Einstein was wrong about spooky action at a distance. The correlation is non-local and real. And Everett's many-worlds: every quantum event creates branching realities, each equally real. Lewis admits he finds that both beautiful and somehow depressing. Quantum mechanics underlies every transistor, every laser, every MRI machine. It is the most successful scientific theory ever devised. Nobody fully agrees on what it means.
If you enjoyed this episode, please subscribe — and send your topic suggestions to podcast@under10.org. We read every one.
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