Rephonic
Artwork for Shirtloads of Science

Shirtloads of Science

Dr Karl Kruszelnicki
Climate Change
Artificial Intelligence
Dark Matter
Black Holes
Biodiversity
Astrophysics
University Of Sydney
Australia
Vaping
Carbon Dioxide
Wikipedia
Neutron Stars
Generative AI
Mathematics
Public Health
Nobel Prize
Fossil Fuels
Neutrinos
Sunblock
Misinformation

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. Series Producer: Isabelle Benton Technical Producer: Maya Cook

PublishesWeeklyEpisodes463Founded10 years ago
Number of ListenersCategories
PhysicsEarth SciencesScience

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Artwork for Shirtloads of Science

Latest Episodes

Astronomer and soon-to-be Dr. Kovi Rose joins us to discuss his newly published Nature Astronomy paper on one of the universe's newest mysteries: strange repeating flashes of radio waves and X-rays coming form deep within our galaxy! His team's disco... more

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, w... more

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 behin... more

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, ... more

Key Facts

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Find out how many people listen to this podcast per episode and each month.

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Recent Guests

Kovi Rose
Astrophysicist and PhD candidate at the University of Sydney
University of Sydney
Episode: Solving a Cosmic Radio Signal Mystery with Kovi Rose (477)
Professor Clare Collins
Professor (nutrition and public health) invited guest
University of Newcastle / University of Sydney
Episode: Coffee & Blood Pressure Explained with Prof. Clare Collins (476)
Clare Collins
Professor of Dietetics / Nutrition Scientist
University of Newcastle / Nutrition Society of Australia
Episode: The Hidden Health Benefits of Honey with Prof. Clare Collins (475)
Theresa Fruth
German physicist, experimental particle physicist
University of Sydney (LZ/Zeppelin-related experiments)
Episode: The Hunt for Dark Matter with Dr. Theresa Fruth (474)
Ollie Jay
Professor of Heat and Health at the University of Sydney; Director of the Heat and Health Research Centre
University of Sydney
Episode: The Human Cost of One Degree with Prof. Ollie Jay (473)
Emmanuel Stamatakis
Professor of physical activity and population health
University of Sydney
Episode: Incidental Exercise with Prof. Emmanuel Stamatakis (472)
Michael Brown
Associate Professor of Astronomy
Monash University
Episode: Dumb Stuff In Space with Assoc. Prof. Michael Brown (471)
Conny Aerts
gravito-inertial astro-seismologist
University of Leuven / Belgian academic community
Episode: Using Soundwaves To Measure The Sun with Prof. Conny Aerts (470)
Hannah Gould
Senior Lecturer at the University of Melbourne, death and dying researcher
University of Melbourne
Episode: How To Die in the 21st Century with Dr. Hannah Gould (469)

Host

Dr Karl
Host of Shirtloads of Science (producing organization often listed as University of Sydney involvement).

Reviews

4.7 out of 5 stars from 1.1k ratings
  • Inkredible

    Greatest show of all time 🇦🇺

    Apple Podcasts
    5
    Squidkid🦑
    Australiaa month ago
  • Love your work Carl!

    One of the only podcasts I ever listen to, and for good reason! Carl has all the Lo pics down pat and explains them in very easy-to-understand ways. Would definitely recommend to anyone

    Apple Podcasts
    5
    no-one in particuluar
    Australia4 months ago
  • More STEM Please

    I love the STEM podcasts the most. But something here for everybody.

    Apple Podcasts
    5
    Robneedsacoffee
    Australiaa year ago
  • Would get 5 sars if

    If the audio level could be boosted about 20 dB, we hearing-impaired might learn a lot from this material.

    Apple Podcasts
    1
    iRichard1941
    United Statesa year ago
  • Bad

    👎👎👎👎👎👎

    Apple Podcasts
    1
    0.0🔪
    Australiaa year ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Informative and entertaining, with credible guests and thoughtful questions.
Clear, engaging science explanations that are accessible to all.
Consistently good science content with approachable host style.
Audio sometimes quiet for some listeners; otherwise high quality.
Great range of topics and excellent guests in STEM.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Apple Podcasts
#47
United States/Science/Physics
Apple Podcasts
#15
United Kingdom/Science/Physics
Apple Podcasts
#22
Canada/Science/Physics
Spotify
#14
Australia/Science
Apple Podcasts
#2
Australia/Science/Physics
Apple Podcasts
#23
Australia/Science

Talking Points

Recent interactions between the hosts and their guests.

Coffee & Blood Pressure Explained with Prof. Clare Collins (476)
Q: Does long-term coffee consumption increase the risk of developing high blood pressure?
Across large cohorts, regular coffee drinking (up to several cups daily) was not associated with a higher risk of developing high blood pressure and may even be associated with a lower risk in some populations, though causality cannot be established from observational data.
Coffee & Blood Pressure Explained with Prof. Clare Collins (476)
Q: What is the range of the acute blood pressure spike after drinking a cup of coffee, and how long does it last?
In most people, the spike is modest—going from roughly 120/80 to around 123-135 systolic and 80-90 diastolic—and returns toward baseline within 30 minutes to two hours, depending on caffeine tolerance, baseline blood pressure, and genetics.
The Human Cost of One Degree with Prof. Ollie Jay (473)
Q: How did you end up focusing on heat and health as a career?
Ollie Jay describes a journey from studying ergonomics and thermal environments to pursuing a PhD in thermal ergonomics, then traveling and working in different countries before a position at the University of Sydney solidified his focus on heat and health and the environment. This personal path illustrates how interdisciplinary training leads to work on climate-related health issues.
How To Die in the 21st Century with Dr. Hannah Gould (469)
Q: How did you become interested in death and dying, and what path led you to this field?
My background in linguistics and anthropology broadened my interest in material culture and death rituals, which then evolved into Buddhist death practices and fieldwork in Japan; this culminated in a PhD on death and dying in Buddhism and a career at the University of Melbourne researching end‑of‑life experiences.
Using Soundwaves To Measure The Sun with Prof. Conny Aerts (470)
Q: What option did you tell your parents so you could study mathematics? Well, you could become a math teacher?
I arranged for my director to speak to my parents, presenting teaching as a viable path, which allowed me to pursue mathematics while keeping the door to astronomy open.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

Listeners per Episode
Gender Skew
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Social Media Reach

Frequently Asked Questions About Shirtloads of Science

What is Shirtloads of Science about and what kind of topics does it cover?

A highly accessible science talk show that brings expert guests across disciplines to explain complex topics in clear, engaging ways. Episodes often center on current research, big questions in physics, space, biology, health, and technology, paired with practical anecdotes and host-led explanations that make science feel approachable for curious listeners. Noteworthy features include a knack for translating technical ideas into everyday relevance, bold explorations of fringe or speculative concepts balanced by rigorous insights, and a consistent emphasis on informing, entertaining, and empowering a broad audience.

Listeners are likely drawn to enthusiastic science communication, value curiosity, and enjoy long-form conversations with rese... more

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Which podcasts are similar to Shirtloads of Science?

These podcasts share a similar audience with Shirtloads of Science:

1. Dr Karl Podcast
2. The Science Show
3. What's That Rash?
4. What The Duck?!
5. Health Report

How many episodes of Shirtloads of Science are there?

Shirtloads of Science launched 10 years ago and published 463 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Shirtloads of Science?

Recent guests on Shirtloads of Science include:

1. Kovi Rose
2. Professor Clare Collins
3. Clare Collins
4. Theresa Fruth
5. Ollie Jay
6. Emmanuel Stamatakis
7. Michael Brown
8. Conny Aerts

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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