Talking Science

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 biodiversity really means, how ecosystems hold together, and why the loss of a single species can ripple through an entire living system.

You’ll come away understanding what an ecosystem is and how food webs work, what “keystone species” are and why they matter far beyond their numbers, and why the sheer variety of life is something worth protecting.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: Australian Museum – biodiversity resources; David Attenborough, A Life on Our Planet; the “Yellowstone wolves” trophic cascade research.

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 one pass by. This episode explains what gravitational waves are, how we detect something almost impossibly faint, and why they’ve given astronomy a completely new sense.

You’ll come away understanding what it means for space and time to ripple, how two colliding black holes can shake the universe, how instruments detect a stretch far smaller than an atom, and why this has opened a brand-new way of observing the cosmos.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: LIGO Scientific Collaboration – public pages; Australian National University / OzGrav – gravitational-wave research; Janna Levin, Black Hole Blues and Other Songs from Outer Space.

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 measurement of damage but something the brain actively creates. This episode explores how pain really works, and why that changes how we understand it.

You’ll come away understanding how the body detects harm and signals it, why pain is made in the brain rather than in the injured part, why the amount of pain doesn’t always match the amount of damage, and what this means for people living with long-term pain.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: Lorimer Moseley & David Butler, Explain Pain; the “Pain” resources from the Australian Pain Society; Irene Tracey’s neuroimaging research on pain.

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 and hear nothing. That contradiction is the Fermi paradox, and this episode explores the unsettling gap between what we'd expect and the silence we actually find.

You'll come away understanding why the numbers suggest we shouldn't be alone, what the Drake equation really is, the leading explanations from the “Great Filter” to the possibility that we're simply early, and why honest scientists say we genuinely don't know.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: SETI Institute – “The Drake Equation”; NASA Astrobiology – “Are we alone?”; Stephen Webb, If the Universe Is Teeming with Aliens... Where Is Everybody?

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 epigenetics: a layer of chemical switches and markers that decide which genes are switched on and off. This episode explores how the same code can be read in countless ways, and how the environment leaves its mark.

You'll come away understanding what epigenetics actually is, how cells with identical DNA become wildly different, how experiences and environment can change gene activity, and why claims about “inherited trauma” need careful handling.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: University of Utah – “Learn.Genetics: Epigenetics”; Nature – “Epigenetics” collection; Nessa Carey, The Epigenetics Revolution.

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 power grid itself. This episode opens up the humble battery: how a controlled chemical reaction pushes electrons through your devices, why lithium-ion changed the world, and why energy storage is one of the great bottlenecks of the century.

You'll come away understanding what actually happens inside a battery, the difference between single-use and rechargeable cells, why lithium-ion won, and the real challenges facing the batteries we'll need next.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: Royal Society of Chemistry – “How batteries work”; US Department of Energy – “How does a lithium-ion battery work?”; 2019 Nobel Prize in Chemistry background (lithium-ion batteries).

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, yet built by animals just millimetres across. This episode looks at how the reef was made, the mass bleaching events of recent years, and the science of trying to protect it, with a clear-eyed view of what is and isn't known.

You'll come away understanding the sheer scale of the reef, the coral-algae partnership that builds it, what recent bleaching events mean, and how scientists weigh threats against the reef's real resilience.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: Australian Institute of Marine Science – annual reef condition reports; Great Barrier Reef Marine Park Authority – reef health; UNESCO World Heritage – Great Barrier Reef.

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 Mars are reshaping what's possible — and raising hard questions about cost, risk and purpose. This episode surveys where human spaceflight really stands and where it might realistically be heading.

You'll come away understanding why reusability changed the economics, what a return to the Moon involves, the genuine obstacles to reaching Mars, and how to tell grounded plans from hype.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: NASA – “Artemis” program; ESA – human and robotic exploration; National Academies – human spaceflight reports.

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 unpacks how epidemics grow, where new diseases come from, what a number like R0 really means, and what recent history has taught us — handled soberly, as befits a serious subject.

You'll come away understanding the difference between an outbreak, an epidemic and a pandemic, why exponential growth is so counter-intuitive, how diseases jump from animals to humans, and what actually slows a pandemic down.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: World Health Organization – epidemic and pandemic preparedness; Australian Department of Health – communicable disease resources; CDC – “Principles of Epidemiology”.

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 explores intelligence in octopuses, crows, dolphins and more, and asks how we can even test for it.

You’ll come away understanding why intelligence isn’t a single ladder with humans on top, how animals as different as an octopus and a crow can be so clever, and why judging other minds is one of the hardest things science tries to do.

Talking Science is sponsored by Kinsoft. Visit www.kinsoft.com.au

Further reading: Frans de Waal, Are We Smart Enough to Know How Smart Animals Are?; Peter Godfrey-Smith, Other Minds; the research of the University of Cambridge comparative cognition group.