Dr Karl Podcast

The Doctor Karl Podcast

The Dr Karl Podcast is a weekly science-focused audio program produced by the Australian Broadcasting Corporation (ABC) for its youth-oriented network, triple j. Hosted by the prominent science communicator Dr Karl Kruszelnicki and radio presenter Lucy Smith, the podcast serves as a digital archive and extension of the long-running science segment originally broadcast during the triple j Mornings program. The show follows a listener-driven inquiry format, where the audience presents questions ranging from fundamental physics and biological processes to the debunking of popular urban legends and scientific myths.

Each episode typically features Dr Karl and Smith engaging with a rotating panel of subject matter experts, including astrophysicists, medical doctors, and research scientists. This collaborative approach ensures that answers are grounded in current peer-reviewed research and empirical evidence. The subject matter is diverse, often covering topics such as the mechanics of the universe, environmental science, chemistry, and human physiology. The primary objective of the program is to provide factual, accessible explanations for complex phenomena, facilitating a broader public understanding of science through direct engagement.

Dr Karl Kruszelnicki brings decades of experience in science communication to the program, utilizing a descriptive and analytical style to break down intricate theories. The podcast maintains a structured yet conversational delivery, prioritizing clarity and accuracy over entertainment-driven speculation. While the show originates in Australia and reflects the perspectives of the triple j listener demographic, the scientific principles discussed have global relevance. New episodes are released weekly, cataloging a vast range of inquiries that reflect the contemporary scientific curiosities of the public. The program remains a significant part of the ABC’s educational output, bridging the gap between academic research and general interest.

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Episodes

1014-

Honeybees, climate change and pollination

17 Sep 2026
1013-

Radio stars, spiral galaxies and threadworms

In this episode of Science with Dr. Carl, host Lucy Smith and Dr. Carl interview radio astronomer Dr. Laura Dreesen about solar eclipses, the discovery of radio stars, and recent astronomical breakthroughs like long-period radio transients and early spiral galaxies. Dr. Carl then addresses a variety of listener questions, covering topics from the physiological effects of conditioning and biological responses to red light to the physics of planetary motion and the expansion of the universe. The episode also explores the chemistry of silicon sealant, the relationship between mass and energy via E=mc², and the impact of intestinal worms on human immunity.

10 Sep 2026
1012-

The third eye, scented candles and norovirus

In this episode of Science with Dr. Carl, the hosts explore a wide range of biological and physical phenomena, from the complex color-changing mechanisms of cuttlefish to the mathematical vastness of musical note combinations. The discussion also addresses listener questions regarding seismic activity, the visual effects of the moon's halo, and debunking the TikTok trend claiming the human forehead is magnetic. Dr. Carl further delves into the science of daily life, explaining why scented candles smell stronger when extinguished and how shift work can disrupt gut rhythms. The episode concludes with insights into the storage capacity of the human brain, the biological functions of vitamin D, kneecaps, and earwax, and a reminder regarding hand hygiene to prevent stomach bugs.

03 Sep 2026
1011-

Black tea, pins & needles and toilet doors

In this episode of Science with Dr. Carl, the hosts and Dr. Carl answer a wide range of listener questions, covering topics from planetary gravity and the physics of clothing to the physiological connection between black tea and nausea via the vagus nerve. The discussion also explores the use of ethylene gas in ripening fruit, public toilet door design, and the temperature required to freeze Earth's oceans. The episode further delves into building safety codes, the risks of nerve compression during sleep, and the mechanics of sneezing. Finally, the doctors explore the science behind aromatherapy and how certain scents might trigger neural responses, before concluding with some lighthearted banter.

27 Aug 2026
1010-

Calcium v. iron, E=mc² and The Pill

Celebrating National Science Week, this episode of Science with Dr. Karl features guests Kate Thomas and Caitlin Thurn to explore a wide range of scientific inquiries. The discussion covers topics from the energy implications of E=mc² and the impact of AI on protein folding to the physiological effects of high altitude and nutrition. The hosts also delve into evolutionary parenting strategies in animals, the genetics of mental health, and medical clarifications regarding birth control and pseudohypoaldosteronism. From the physics of light reflection to the biological effects of nicotine, the episode addresses diverse listener questions through a scientific lens.

20 Aug 2026