The Discovery That Changed Astrophysics with Prof. Dame Jocelyn Bell Burnell (455)
In this episode, I'm joined by the legendary Dame Susan Jocelyn Bell Burnell - the pioneering astrophysicist who discovered pulsars, launching an entirely new field of astrophysics. She began her PhD searching for quasars, but soon noticed a strange, repetitive signal appearing night after night - so peculiar she jokingly labelled it LGM ("Little Green Men"). That signal would become one of the most important astronomical discoveries of the century, though the credit and Nobel Prize were controversially awarded to her supervisor. Dr Bell Burnell also shares why she donated $4.3 million of her own prize money to support underrepresented researchers in physics, especially women and girls, and the work she's doing to make the field more inclusive. We dive into her views on religion, her life in science since that landmark discovery, and her mission to help more young women pursue careers in physics.
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32:01
Sunscreen Safety in Australia with John Staton (454)
This week I'm joined by John Staton, one of Australia's leading sunscreen-testing experts, to unpack the big headlines surrounding sunscreen safety. A recent Choice report revealed that 16 out of the 20 tested sunscreen products failed to meet their advertised SPF rating by a significant figure. John helps us to understand what is really going on. He breaks down how sunscreens actually work and the science behind SPF testing and why so many products fell short.
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24:29
What are Time Crystals? with Prof. Geraint Lewis (453)
In this episode, friend of the show and astrophysicist Professor Geraint Lewis returns to help me wrap my head around one of the strangest ideas in modern physics: Time Crystals. After stumbling across a Nature article that left my brain pleasantly scrambled, I called up Geraint for a deep-dive into what time crystals are and why physicists are so excited about them. We explore why Time Crystals don't have real-world applications yet, but how they could open entirely new frontiers in future technology.
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28:59
Science in Oz: The Good, The Bad and The Ugly with Dr. Catherine Ball (452)
In this episode, futurist and award-winning scientist Dr Catherine Ball dives into the state of science in Australia, uncovering the good, the bad, and the overlooked. From humanoid robotics and wearable exoskeletons transforming healthcare, to Australia's lagging space economy, Ball offers an unflinching look at where we stand. She also highlights world-class cancer detection research happening in Australia, like PROCAN and early ovarian cancer screening innovations that deserve far more recognition. Passionate about inspiring the next generation, Ball shares her advice for young Australians ready to shape the future of science ww.drcatherineball.com/
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31:08
Food Additives: What's Safe, What's Not? with Prof. Clare Collins (451)
In this episode, I'm joined by Professor Clare Collins, Australian dietitian and Professor of Nutrition and Dietetics at the University of Newcastle. Clare is my go-to expert when it comes to all things nutrition, and today she's here to unpack the often confusing world of processed and ultra-processed foods. We dive into what really separates the two, explore the role of additives, emulsifiers, and flavour enhancers, and discuss how some of these ingredients, designed to make foods more appealing, may be doing our health more harm than good. Plus, she shares practical, no-nonsense tips to help you make smarter choices next time you're wandering the grocery aisles. Check out Clare's free online resource, No Money No Time, for simple, budget-friendly recipes and nutrition advice - nomoneynotime.com.au/ Follow Clare on X: @ProfCCollins and LinkedIn: Clare Collins.
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.
https://drkarl.com/
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