Talking Science is your weekly dive into the wonders of the scientific world. Join our hosts as they break down complex ideas into fun, engaging conversations—covering everything from cutting-edge discoveries and mind-bending theories to everyday science that shapes our lives. Whether you’re a curious learner, a science enthusiast, or just someone who loves a good "aha!" moment, Talking Science makes big ideas accessible, entertaining, and thought-provoking.
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Nov 12, 2026 · 22:37
An ordinary wave rolls onto the sand every few seconds; a tsunami can take tens of minutes between crests and cross an entire ocean at the speed of a jet aircraft while barely…
Nov 10, 2026 · 20:10
A folded square of paper and a butterfly's wings share the same simple visual idea: a shape that looks the same after some transformation. This episode follows that idea from…
Nov 8, 2026 · 26:30
A pot plant on a windowsill quietly bends toward the light within days, with no eyes, brain or nervous system involved at all. This episode explores how plants detect light…
Nov 5, 2026 · 22:44
Mercury is the smallest planet in the solar system and the closest to the Sun, yet it's one of the least visited worlds we know, studied up close by only two spacecraft in fifty…
Nov 3, 2026 · 23:00
Turn on a bore tap in the middle of outback Queensland and water can come gushing out under its own pressure, with no pump in sight, sometimes water that fell as rain before the…
Nov 1, 2026 · 25:11
Quantum entanglement gets described as spooky, instant, faster-than-light communication between particles, and almost none of that popular framing survives contact with the…
Oct 29, 2026 · 25:46
The mushroom on your pizza is just the tip of the organism, a temporary fruiting structure sitting above a vast, mostly invisible network that might stretch for kilometres…
Oct 27, 2026 · 27:09
The last time a spacecraft visited Uranus or Neptune, it was 1986 and 1989 respectively, and nobody has been back since. This episode explores why these two outer worlds get…
Oct 25, 2026 · 22:28
Rain that vanishes into the ground in a limestone landscape isn't just soaking away — it can be dissolving solid rock, one drop at a time. This episode explains the chemistry…
Oct 22, 2026 · 23:42
Right now, a hundred trillion particles from the Sun are passing through your body every second, and you'll never feel one. This episode traces the neutrino from Wolfgang Pauli's…
Oct 20, 2026 · 19:27
Skip a meal and feel foggy an hour later? That's your body's fuel-management system sending an urgent signal. This episode explains what metabolism actually means, how insulin…
Oct 18, 2026 · 22:39
How do astronomers know a galaxy is two million light years away, or thirteen billion? This episode climbs the cosmic distance ladder rung by rung, from bouncing radar off Venus,…
Oct 15, 2026 · 24:03
Hold an ordinary rock in your hand, and you're holding something that, statistically, is probably older than every human civilisation combined, older than the dinosaurs, quite…
Oct 13, 2026 · 21:59
Pick up a small fridge magnet and use it to lift a paperclip off the table, and you've just watched electromagnetism, working through a scrap of moulded plastic and metal,…
Oct 11, 2026 · 24:45
A bee sting that sends one person to hospital and barely bothers the person standing next to them; a pancreas that quietly stops making the insulin the body needs; a small…
Oct 8, 2026 · 25:37
On a clear, dark night, away from city lights, the Milky Way arcs overhead as a soft river of stars — and buried in the dense, glowing crowd of that river's centre sits something…
Oct 6, 2026 · 26:28
Turning into a fossil is far rarer than a museum full of skeletons might suggest - it takes a specific, unlikely sequence of chance and chemistry, and most living things that…
Oct 4, 2026 · 23:31
Friction is so ordinary that it's easy to overlook - it's the reason your shoes grip the footpath and your car can stop at a red light - but it's also one of the biggest sources…
Oct 1, 2026 · 22:12
Blood looks simple - a red liquid that appears whenever you're cut - but it's actually one of the most sophisticated tissues in the human body, carrying oxygen, fighting…
Sep 29, 2026 · 24:08
Every day, tonnes of material from space drift down through Earth's atmosphere, and every so often a fragment survives the fall intact enough to land in someone's paddock, or…
Sep 27, 2026 · 26:22
Every phone, car battery, kitchen bench and steel beam traces back to rock pulled out of the ground somewhere, shaped over geological time by processes most of us never think…
Sep 24, 2026 · 23:05
Your ears popping on a flight, a sealed bag of chips ballooning up at cruising altitude, a pressure cooker cutting a stew's cooking time in half — all of it is the same simple…
Sep 22, 2026 · 24:43
Every day, in operating theatres all over Australia, people are deliberately, reversibly switched off, their pain, memory and movement suspended long enough for a surgeon to…
Sep 20, 2026 · 25:55
The night sky isn't only the pinpricks of starlight we see with our eyes — it's also quietly broadcasting on wavelengths we can't see at all, and for the last century a small…
Sep 17, 2026 · 24:53
Roughly seventy per cent of Australia is arid or semi-arid, yet the outback is far from empty: it runs on a distinctive boom-and-bust rhythm built around unpredictable rain. This…
Sep 15, 2026 · 27:24
Fire and explosives are, at heart, the same chemistry running at wildly different speeds: rapid oxidation releasing energy. This episode covers the fire triangle, why flames take…
Sep 13, 2026 · 26:20
Smell and taste are the body's chemical senses, detecting actual molecules rather than light or sound, and between them they quietly create most of what we experience as flavour.…
Sep 10, 2026 · 21:50
Far beyond Neptune, past even the icy Kuiper Belt, astronomers believe an enormous, invisible shell of ancient comets surrounds the entire solar system: the Oort Cloud. This…
Sep 8, 2026 · 25:19
Ask an Australian farmer about the years that stick in their memory and you'll usually hear about extremes: a drought so long the dams cracked, or a wet season so relentless the…
Sep 6, 2026 · 26:31
There's a persistent piece of trivia that old windows are thicker at the bottom because glass slowly flows downward over centuries, like an extremely patient liquid. It's a…
Sep 3, 2026 · 20:33
Walk out of a loud concert and the world sounds muffled, with a faint ring that takes hours to fade — a small, temporary demonstration of just how much delicate mechanical…
Sep 1, 2026 · 23:14
Stand under a leafy tree during a partial solar eclipse and something strange happens to the ground: instead of round blobs of sunlight, you get hundreds of tiny crescents, every…
Aug 30, 2026 · 20:39
The ocean isn't the calm, flat expanse it can look like from the shore — it's laced with enormous rivers of moving water, from wind-driven surface currents to a slow deep…
Aug 27, 2026 · 21:11
A spoon bends; a ceramic mug shatters. That simple kitchen-table difference comes down to a "sea of electrons" binding metal atoms together, and it's the same basic idea that…
Aug 25, 2026 · 23:55
The sharp, seamless, full-colour picture you seem to be looking at right now isn't a direct recording of the world — it's a construction, built by your brain from a stream of…
Aug 23, 2026 · 13:03
Saturn's largest moon looks almost like a distant cousin of early Earth: a thick atmosphere, rivers, lakes, rain and genuine weather. But every drop of that rain is liquid…
Aug 20, 2026 · 21:51
In some coastal cities, ordinary high tide on a clear, calm, cloudless day is now enough to send seawater bubbling up through the drains and into the streets, with no storm in…
Aug 18, 2026 · 24:02
Tip a little table salt onto a dark plate and look closely, with a magnifying glass if you have one, and you'll find that every single grain is a tiny, near-perfect cube, formed…
Aug 16, 2026 · 15:32
Every single day, without you noticing or doing anything at all, roughly 180 litres of fluid are filtered out of your blood, checked over in extraordinary detail, and almost all…
Aug 13, 2026 · 23:21
That faint, fuzzy smudge hanging below the three stars of Orion's belt isn't a star at all — it's a cloud of gas and dust several light years across, and inside it, right now,…
Aug 11, 2026 · 19:08
A glacier looks like the stillest thing on Earth, and yet it is quietly flowing, carving valleys and fjords, and preserving an extraordinarily detailed record of the planet's…
Aug 9, 2026 · 23:19
An ice cube melting in a glass of water quietly demonstrates one of the most fundamental ideas in all of physics and chemistry: matter changing between states as the balance…
Aug 6, 2026 · 24:44
The flutter before a big moment, the sleepiness that arrives as the room dims, the steady pull of blood sugar back to normal after a meal — none of it happens by conscious…
Aug 4, 2026 · 21:36
Every second, invisible high-speed particles born in the deaths of distant stars — and possibly in sources far more extreme still — are raining down through Earth's atmosphere…
Aug 2, 2026 · 21:37
Clouds form through a simple, elegant recipe of rising air, cooling and condensation onto tiny particles of dust and salt — yet that same familiar sky-scenery turns out to be the…
Jul 30, 2026 · 22:42
From the sourness of a lemon to the acid in your stomach and the slow chemical drift of the oceans, acidity is a single, simple idea — the concentration of hydrogen ions in a…
Jul 28, 2026 · 22:30
A single fertilised cell, in the space of months, becomes a fully formed body with a beating heart, a working brain and everything else in roughly the right place — without a…
Jul 26, 2026 · 17:55
Space between the stars looks empty, but it's filled with a vast, thin soup of gas and dust called the interstellar medium — the raw material of new stars and the recycled…
Jul 26, 2026 · 20:59
Humans have become so powerful a force that we're now leaving a permanent mark in the rock record itself — from plastics and concrete to nuclear traces and shifted carbon. That…
Jul 26, 2026 · 23:52
Modern physics rests on two spectacularly successful theories — one for the very large, one for the very small — and they flatly contradict each other. The dream of uniting them…
Jul 26, 2026 · 22:01
As climate change advances, some scientists have begun seriously studying a set of dramatic, deliberate interventions in the Earth's systems — from reflecting sunlight away to…
Jul 25, 2026 · 22:01
Sound is so constant that we rarely stop to ask what it actually is. The answer is surprisingly physical: sound is a wave of pressure rippling through the air, and everything…
Jul 25, 2026 · 19:43
Fire is woven into the Australian landscape in a way few other places on Earth can match. Many native plants don't just survive fire — they depend on it. But fire is also a…
Jul 25, 2026 · 14:13
Heat feels like the most ordinary thing in the world, yet the science of it — thermodynamics — turns out to be one of the deepest and most far-reaching in all of physics,…
Jul 25, 2026 · 19:00
Water covers most of the planet, yet the fresh water that farms, cities and ecosystems depend on is a startlingly thin slice of the total — and it's unevenly spread, easily…
Jul 25, 2026 · 20:00
A compass needle swinging to point north is hinting at something enormous: our entire planet is a giant magnet, wrapped in an invisible field that reaches far out into space.…
Jul 25, 2026 · 21:37
Radioactivity has a fearsome reputation, but at its core it's a natural process that's been happening since before the Earth existed — unstable atoms shedding energy to become…
Jul 25, 2026 · 21:42
Australia is home to animals found nowhere else on Earth: mammals that lay eggs, marsupials that raise young in pouches, and a bewildering array of species that evolved in…
Jul 25, 2026 · 22:37
Almost everything electronic you own runs on tiny switches carved into silicon — a material that is neither a good conductor nor a good insulator, and whose in-between nature is…
Jul 25, 2026 · 20:19
Plastics are so useful, cheap and durable that they transformed the twentieth century — and so long-lasting that they've become one of the defining environmental problems of the…
Jul 25, 2026 · 18:58
Given enough time, a trickle of water can cut a canyon a kilometre deep. Rivers are the great sculptors of the land, patiently carrying mountains grain by grain to the sea, and…
Jul 25, 2026 · 19:56
A catalyst is a substance that makes a chemical reaction go faster — often dramatically faster — without being used up itself, quietly making possible reactions that would…
Jul 25, 2026 · 19:39
Nature isn’t just a random collection of plants and animals — it’s a vast web of connections in which everything depends on everything else. This episode explains what…
Jul 25, 2026 · 20:47
A century ago, Einstein predicted that violent events in space should send ripples through the fabric of spacetime itself — and in 2015, after decades of effort, we finally felt…
Jul 25, 2026 · 20:15
Pain is something we all want less of, yet it’s one of the most important protective systems we have — and it’s far stranger than it seems, because pain is not simply a…
Jul 25, 2026 · 22:46
The universe is vast and old, with billions of Sun-like stars and billions of years for life to arise — so by rights the galaxy should be humming with civilisations. Yet we see…
Jul 25, 2026 · 18:20
Your DNA is often called a blueprint, but a blueprint doesn't explain why a skin cell and a brain cell — carrying identical genes — behave so differently. The answer lies in…
Jul 25, 2026 · 24:34
Batteries are so ordinary we barely notice them, yet the ability to store electricity in a small, portable package underpins phones, laptops, electric cars and increasingly the…
Jul 25, 2026 · 20:58
Stretching more than two thousand kilometres along Australia's north-east coast, the Great Barrier Reef is the largest living structure on Earth — so big it's visible from space,…
Jul 25, 2026 · 20:39
For decades, sending humans into space meant a handful of government astronauts in low Earth orbit. Now reusable rockets, private companies and renewed ambitions for the Moon and…
Jul 25, 2026 · 18:59
A pandemic is what happens when a new infectious disease spreads across the globe, and the mathematics of that spread is both simpler and stranger than it seems. This episode…
Jul 24, 2026 · 22:05
We tend to measure animal cleverness by how much it resembles our own — but some of the most remarkable minds on Earth are built on entirely different plans. This episode…
Jul 24, 2026 · 20:26
Water is so familiar we barely notice it, and yet almost everything about it is scientifically peculiar — it breaks the rules that other liquids obey, and life depends utterly on…
Jul 24, 2026 · 24:08
Coal, oil and gas power most of the modern world, but few of us stop to think about what they actually are: the buried, transformed remains of living things from unimaginably…
Jul 24, 2026 · 22:29
Venus is almost exactly the same size as Earth, made of the same stuff, and formed right next door — yet it became one of the most hellish places in the solar system. This…
Jul 24, 2026 · 22:44
Taking a living organ from one person and making it work inside another is one of medicine’s most astonishing achievements — and the biggest obstacle isn’t the surgery, but the…
Jul 24, 2026 · 22:19
In 2006 Pluto was famously “demoted” from planet to dwarf planet, and plenty of people are still cross about it — but the real story is far more interesting than a snub. This…
Jul 24, 2026 · 20:08
Every living thing on Earth is built around a single element, and it isn’t there by accident — carbon has a chemical talent that no other element can match. This episode explains…
Jul 24, 2026 · 17:25
Your smile, your eye colour, the shape of your nose — you carry echoes of your parents in your very cells. This episode unpacks the genetics of inheritance: how traits pass from…
Jul 24, 2026 · 22:34
Launched in the 1970s with less computing power than a modern key fob, two small spacecraft have journeyed further from home than anything humanity has ever built — and they’re…
Jul 24, 2026 · 23:00
The world is racing to shift how it makes electricity, away from burning fossil fuels and towards energy drawn from the sun, the wind and moving water. This episode explains how…
Jul 24, 2026 · 22:38
Everything around you — water, salt, metal, your own body — exists because atoms join together in a few specific ways. This episode explains chemical bonds, the invisible glue…
Jul 24, 2026 · 21:27
We talk about “gut feelings” and “butterflies in the stomach” as if they’re just figures of speech, but there’s a genuine, physical conversation happening between your gut and…
Jul 24, 2026 · 21:05
Floating weightlessly in orbit looks like the ultimate freedom, but the human body evolved under gravity’s constant pull, and taking that pull away does strange and serious…
Jul 24, 2026 · 22:02
High above our heads sits a thin, invisible shield of gas that makes life on land possible — and in the twentieth century we very nearly destroyed it, then pulled together and…
Jul 24, 2026 · 21:54
Getting older feels so inevitable that we rarely ask why it happens at all — but ageing is a genuine scientific puzzle, and researchers are steadily uncovering what actually…
Jul 24, 2026 · 21:06
Antimatter sounds like pure science fiction, but it’s entirely real, it’s made in laboratories every day, and the fact that it exists at all points to one of the deepest unsolved…
Jul 24, 2026 · 20:30
We watch rockets thunder off the launch pad and vanish into the sky, but the physics that gets them there is both simpler and stranger than most people imagine. This episode…
Jul 24, 2026 · 18:18
A virus can shut down a city, yet on its own it can do almost nothing at all — it can't grow, can't feed, can't even reproduce without hijacking a living cell. This episode asks…
Jul 24, 2026 · 22:13
Orbiting the Earth alongside our working satellites is a growing swarm of debris — dead spacecraft, spent rocket stages and countless fragments — hurtling around the planet fast…
Jul 24, 2026 · 20:57
The air around us feels like empty nothingness, but it's a thin, structured, life-giving envelope wrapped around the planet — one that shields us, warms us, and paints the sky…
Jul 24, 2026 · 22:24
Beneath the border of France and Switzerland runs a 27-kilometre ring where scientists hurl particles at each other at almost the speed of light and sift through the wreckage for…
Jul 24, 2026 · 16:39
Extinction is the normal fate of almost every species that has ever lived — but five times in Earth's deep history, the losses spiked into catastrophe, wiping out huge fractions…
Jul 24, 2026 · 19:06
A million and a half kilometres from Earth, a golden telescope the size of a tennis court's sunshield sits in the cold and dark, catching faint infrared light from the edge of…
Jul 24, 2026 · 19:05
We call it dirt, we scrape it off our shoes, and we rarely give it a thought — yet almost all of our food, and much of life on land, depends on the thin skin of soil covering the…
Jul 24, 2026 · 21:35
From the checkout scanner to eye surgery to the internet itself, lasers are woven through modern life — yet most of us have no idea what makes laser light different from the…
Jul 24, 2026 · 22:37
Every breath you take and nearly every meal you eat traces back to a single quiet chemical trick that plants, algae and some bacteria perform: turning sunlight, water and air…
Jul 24, 2026 · 23:02
Scattered through the solar system are billions of leftover scraps from its birth — rocky asteroids and icy comets that never got swept up into a planet. This episode explores…
Jul 23, 2026 · 22:02
When a massive star dies, it can leave behind an object so dense that a sugar-cube-sized piece would weigh as much as a mountain: a neutron star. Some spin hundreds of times a…
Jul 23, 2026 · 21:17
The water in your glass is older than the dinosaurs, older than the planet's first life — the same finite supply, recycled endlessly through ocean, sky, land and living things.…
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