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Shirtloads of Science: Daily Summaries Delivered
by Dr Karl Kruszelnicki
Dr Karl's a curious optimist – a great combination for a science lover. Join him and his guests for weird facts, amazing conversation and remember, it's never too late for a happy childhood.
Latest Episodes
The most recent episodes — sign up to get AI-powered summaries of each one.
- 5 days ago17 min
Coffee & Blood Pressure Explained with Prof. Clare Collins (476)
Professor Clare Collins returns to the pod to answer a common question: does coffee raise your blood pressure? We also discuss how genetics influence whether you're a fast or slow caffeine metaboliser, the beneficial phytonutrients found in coffee, why decaf still has health benefits, and when people with high blood pressure may need to be more cautious with their intake. nomoneynotime.com.au
- 1 weeks ago30 min
The Hidden Health Benefits of Honey with Prof. Clare Collins (475)
Friend of the pod Professor Clare Collins returns to dive down into the sticky depths of the surprisingly powerful world of honey - far beyond being "just a sugary liquid". From the hallucinogenic "mad honey" of the Rhododendrons to the science behind medical-grade honey dressings that can heal wounds days faster than conventional treatments, Dr. Clare explains why this ancient food deserves a second look. We dive into honey's beneficial micronutrients, anti-inflammatory properties, and why the nutritional profile can vary dramatically depending on where bees source their pollen. Clare also busts the myth that honey is "bee vomit", revealing the fascinating biology behind how bees actually make honey and why these incredible insects deserve our respect! nomoneynotime.com.au
- 2 weeks ago28 min
The Hunt for Dark Matter with Dr. Theresa Fruth (474)
What is the universe actually made of? Particle physicist Theresa Fruth join us at Shirtloads to explore one of science's greatest unsolved mysteries - dark matter! Making up roughly 85% of the universe, yet appearing in none of our known particles, dark matter is invisible, elusive and almost certainly the reason the universe (and us!) exist at all. Theresa and her team are hunting for it anyway. Working 1.2 kilometres underground in a converted gold mine in regional Victoria, they're searching for WIMPs - weakly interacting massive particles - in one of the quietest, most interference-free environments on Earth. The lab is being built out now, and further experiments are on the horizon. We may be closer to one of the biggest discoveries in scientific history than we realise.
- 3 weeks ago32 min
The Human Cost of One Degree with Prof. Ollie Jay
Professor Ollie Jay, a leading expert in heat and health, returns to Shirtloads to discuss the growing toll of climate change on human wellbeing and global economics. Insights drawn from the latest Lancet Countdown report show that over half a million people die from heat-related causes each year, and a million more from fossil fuel pollution - deaths that are largely preventable. Rising temperatures are quietly reshaping our daily lives, from reducing physical and cognitive productivity, to costing the global economy and estimated trillion dollars annually. But it's not all bleak - Professor Jay highlights that meaningful change is within reach. With the right political action and long-term interventions, we can protect both public health and economic stability - the solutions are already in our hands.
- May 3, 202631 min
Incidental Exercise with Prof. Emmanuel Stamatakis (472)
In this episode, we speak with Professor Emmanuel Stamatakis about Vigorous Intermittent Lifestyle Physical Activity (VILPA) - short bursts of high-intensity movement built into everyday life, like walking briskly or carrying groceries. With only a quarter of adults exercising regularly, his research highlights how incidental activity, when done with enough intensity, can offer meaningful health benefits. We discuss how VILPA is grounded in observational research and the idea of "exercise snacks" which describes quick, accessible moments of effort that add up. The focus is on helping people recognise and maximise these daily opportunities to improve fitness and support long-term health.
- Apr 25, 202633 min
Dumb Stuff In Space with Assoc. Prof. Michael Brown (471)
We're living through the great Space Boom and with great innovation comes a lot of whacky ideas... Astronomer and Associate Professor Michael Brown from Monash University joins me to discuss stupid things in space. The conversation dives into some of the more bizarre and ambitious ideas circulating the space industry, from firing villains and radioactive waste in to the sun to deploying giant orbital mirrors to light up Earth's dark side. Brown breaks down why many of these concepts are far less practical than they sound. With over 15,000 satellites circling earth, Brown also examines the promises and downsides of mega-constellations like Starlink, including how they operate and the challenges they pose for astronomers and the environment. It's a fascinating and critical peek in to the intersection of innovation, risk, and imagination in the new space age.
- Apr 18, 202631 min
Using Soundwaves To Measure The Sun with Prof. Conny Aerts (470)
In this episode I sit down with Professor Conny Aerts, a pioneering mathematician and founding figure of astroseismology, who reveals how scientists are "listenting" to stars to understand what's happening deep inside them. From oscillating stars to solar sunquakes, she explains how sound waves can measure the sun's size, age and activity. Beyond the science, she shares her remarkable journey from a small rural town in Belgium where she had to attend an all-boys school, the only school near her family home. She was expected to become a seamstress but Conny's dreams were beyond this planet, leading her on a path toward becoming a highly acclaimed asteroseismologist.
- Apr 11, 202630 min
How To Die in the 21st Century with Dr. Hannah Gould (469)
We're scared to say the D word! But why is talking about death such a taboo? Dr. Hannah Gould, a cultural anthropologist at the University of Melbourne, joins me to discuss the topic - we usually avoid talking about - in the wake of her new book 'How To Die in the 21st Century'. The discussion dives in to the modern experience of dying, from the pressures of having a 'good death' to the reality of overly medicalised, 'prolonged dwindling'. Hannah unpacks how death isn't just biological but also cultural and legal, raising the question: When does death officially occur? The conversation is an invitation to rethink death - not as something to fear, but as something we can approach with openness, intention, and maybe even a sense of celebration!
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About Shirtloads of Science
Dr Karl's a curious optimist – a great combination for a science lover. Join him and his guests for weird facts, amazing conversation and remember, it's never too late for a happy childhood.
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