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Dr Karl Podcast

Dr Karl Podcast

triple j

Science

Join Dr Karl Kruszelnicki, Lucy Smith and their scientific guests, with a bunch of curious triple j listeners for a weekly injection of science, myth-bashing and answers!

Episodes

Super voids, satellite noise and asteroid navigation

Super voids, satellite noise and asteroid navigation

Are black holes really holes? How heavy is a dark star? And what happens when we're mindful? Dr Karl and Dr Laura Driessen answer these questions and more on triple j Mornings with Lucy Smith.
37min•Mar 12, 2026
Morning vs. motion sickness, sunburnt eyes and colour blind dreams

Morning vs. motion sickness, sunburnt eyes and colour blind dreams

Does light travel forever? Why does the dancefloor get so sweaty? And can your friends match your freak? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
37min•Mar 5, 2026
Share house smells, sleeping mosquitoes and multiverse supercomputers

Share house smells, sleeping mosquitoes and multiverse supercomputers

Why are chocolate and coffee the perfect pair? What's the point of having hairy feet? And how do you make the perfect frozen marg? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
41min•Feb 26, 2026
Synesthesia, lime cordial v. bacteria & fusion reactors

Synesthesia, lime cordial v. bacteria & fusion reactors

Does a plucked hair grow back? Why does nicotine suppress your appetite? And how high is the sky? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith
38min•Feb 19, 2026
The Challenger Legacy - new Dr Karl podcast

The Challenger Legacy - new Dr Karl podcast

Doctors, here's a sneak peek of a brand new podcast co-hosted by Dr Karl.
6min•Feb 17, 2026
Cuteness aggression, aphrodisiacs & dolphin orgasms

Cuteness aggression, aphrodisiacs & dolphin orgasms

Why do some people get so hot when they're asleep? Can you flush microplastics out of your body? Do brain freezes become more common as we age? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
38min•Feb 12, 2026
Murphy's Law, mouth ulcers and MSG

Murphy's Law, mouth ulcers and MSG

Where is the centre of the universe? What would happen if the speed of light increased? And what is Dr Karl's favourite maternity fact? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
38min•Feb 5, 2026
Human buoyancy, acclimatising and syncing periods

Human buoyancy, acclimatising and syncing periods

Would we die without dioxygen? Where did spiders come from? And can you learn to hack the cold? Dr Karl and Zoe Kean (OAM!) answer these questions and more on triple j Mornings with Lucy Smith.
42min•Jan 29, 2026
Human cannonballs, outrunning the Sun and burning beds

Human cannonballs, outrunning the Sun and burning beds

Does Missy Higgins have geometrically impossible standards? How high do hot air balloons go? And how much is too much 'Sugar On My Tongue'? Dr Karl answers these questions and more in this special episode of Science with Dr Karl with Lucy Smith.
19min•Jan 8, 2026
Hangovers, mosquitos and manifestation

Hangovers, mosquitos and manifestation

What's the fastest way to cool down a room? How helpful is a stiff drink on a sick day? And is weeing in the shower good for you? Join Lucy, Dr Karl and special guests for a look back on some of our favourite questions from this year all about life hacks!
25min•Jan 1, 2026
Bionic eyes, poop schedules and aphantasia

Bionic eyes, poop schedules and aphantasia

Does Halsey understand DNA properly? How long should we cryogenically freeze ourselves for? And can we learn how to remember everything? Join Lucy, Dr Karl and special guests for a look back on some of our favourite questions from this year all about the human body!
29min•Dec 25, 2025
The age of space, explosive planets and black hole portals

The age of space, explosive planets and black hole portals

How much can a black hole consume? Would anything happen if we all jumped at once? And which planet would have the best gigs? Join Lucy, Dr Karl and special guests for a look back on some of our favourite questions from this year all about space!
27min•Dec 18, 2025
Disappearing poos, capsaicin receptors and cane toads

Disappearing poos, capsaicin receptors and cane toads

What muscles are required for a yawn? How does jewellery affect our skin? And what's the connection between atoms and physical pain? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
40min•Dec 11, 2025
The speed of darkness, sticky spider webs and drinking snow

The speed of darkness, sticky spider webs and drinking snow

How far into space could we hear the Js? What actually causes 'the runs'? And is drinking snow hydrating? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
38min•Dec 4, 2025
Hair loss, bone density and body glitter vs. sunscreen

Hair loss, bone density and body glitter vs. sunscreen

Can you taste with just a sense of smell? Is it possible for your immune system to reset? And what causes period shits? Dr Karl and Dr Theresa Larkin answer these questions and more on triple j Mornings with Lucy Smith.
38min•Nov 27, 2025
Hair of the dog, photographic memories and shingles

Hair of the dog, photographic memories and shingles

Where does all our energy go when we die? Why do humans laugh? And is rain water or tap water better for plant growth? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
40min•Nov 20, 2025
Frozen vs fresh veggies, soap suds and nangs

Frozen vs fresh veggies, soap suds and nangs

Would an invisible person be blind? Can you have too much muscle? And who teaches bees how to make honey? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
38min•Nov 13, 2025
Frisson, cryogenic freezing and thylacines

Frisson, cryogenic freezing and thylacines

What's the deal with Neil the Seal? Can you sniff a fart away? And what does sickness smell like? Dr Karl and Zoe Kean answer these questions and more on triple j Mornings with Lucy Smith.
39min•Nov 6, 2025
Pollen peaks, jump scares and alcohol vs mood

Pollen peaks, jump scares and alcohol vs mood

Is there a link between albedo and climate change? Are four-leaf clovers really that lucky? And could ants rule the world? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
42min•Oct 30, 2025
Butt breathing, plovers and flammable water

Butt breathing, plovers and flammable water

How will the universe end? What makes weight lighter in the pool? And with enough helium, could we float? Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
38min•Oct 23, 2025
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