Are electric vehicles still better for the environment if you charge them with a non-renewable energy source? What happens if you hold your urine for too long? And can you get the physical symptoms of anxiety without feeling anxious? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith. 

How much air pollution do space launches cause? Why don’t babies get bad breath in the morning? And is it true your immune system doesn’t know you have eyes? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith. 

How do some trees survive extreme bushfires? Where did AI begin? And what's the climate change issue that's not getting enough coverage?

For this NAIDOC Week special, Dr Karl is joined by Tiahni Adamson to answer these questions and more on triple j Mornings with Lucy Smith.

How was the earth made? Does time pass differently on other planets? Why does smell just before rain starts?

This isn't a podcast about how climate change is real – we've known that for a long time. And it's not another show about the devastation climate change is causing, or how we got here.

Because we don't need to talk about the problem anymore. We know what's going on.

This is a show about how much better things could be, and the people who are fighting to get us there.

Reporters from the science team at ABC RN and triple j Hack have been travelling around the country to meet the people bringing about real change and coming up with authentic climate solutions.

If we want to avoid a climate catastrophe … WHO'S GONNA SAVE US?

How much pollution does an aeroplane make? Why is it so addictive to pick a scab? What would happen if the world lost oxygen for five minutes?

Is timber making the world heavier? How do you navigate in space? And, why does your wee smell after eating asparagus?

Can war and violence have a lasting impact on our DNA? Would we die if we got shrunk to the size of an ant? How does wind form so quickly?

Dr Karl answers these questions and more, on triple j Mornings with host Lucy Smith.

Why don't we get goosebumps on our face? If we stopped CO2 emissions right now, would we reverse climate change? Why do countries have different power sockets?

Dr Karl answers these questions and more, on triple j Mornings with host Lucy Smith.

Why are females getting long COVID more than males? Why do we cry? How did humans become lactose intolerant?

Dr Karl answers these questions and more, on triple j Mornings with host Lucy Smith.

Can you drive through the end of a rainbow? Is it true that it only takes seven seconds to know you're attracted to someone? Why does clapping sound louder with wet hands?

Dr Karl answers these questions and more. Hosted by Lachie Pringle on triple j Mornings.

How do baby animals (and humans) instinctively know how to suckle when they're born? What purpose do mosquitos have in the ecosystem? How long does a species have to be isolated for it to be considered a 'new' species?

Dr Karl is joined by founder of Deadly Science and proud Gamilaaray man, Corey Tutt to answer these questions and more. Hosted by Lucy Smith on triple j Mornings.

Should you keep your tent flaps open? What happens to helium balloons when you let them go? Why does bottled water have a use by date?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

Why does it become harder to learn things as we get older? If you injured yourself in space, would it hurt as much as it would on earth? And why does cheese taste better melted? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Can our eyes change colour? What would happen if a planet disappeared from our solar system? Why don't we all have the same sense of taste?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

How do dogs experience time? Will the trip to Mars be dangerous? Does Dr Karl believe in Aliens?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

Do ceiling fans work in winter mode? Are tastebuds on the wrong side of the tongue? Can we call blood a solid?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

Would a body decompose in space? Do noise cancelling headphones protect our ears? When will we create a super human?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

Why are thorns on roses less sharp when they are dead? Is it true that oil on Earth is being slowly, but infinitely being replenished? Do painkillers really know how to target pain?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Why do red heads get sunburnt so easily? What would happen if humans never developed muscle memory? Does cold weather make you pee more often? 

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

What makes red dirt red? Why do our sugar levels affect our moods? What's the difference between a conspiracy theorist and a science denialist?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Are there health benefits from eating raw meat? Is spontaneous human combustion a real thing? If a mosquito bites me while I'm drunk, does the mosquito get drunk too?

Dr Karl answers these questions and more, on triple j mornings with Lachie Pringle.

Can lightning make grass greener? What's the closest call we've ever had with a meteorite? Will Artificial Intelligence ever be sentient?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

How can you tell the difference between antibodies and a virus? Would a compass work on Mars? Why are some mosquitos silent and others loud?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Can long term use of cannabis change your eye colour? Why do adults feel the cold more than kids? And what will the next stage of human evolution look like? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Why do we get bags under our eyes when we’re tired? Why do my fingernails grow faster when I’ve been drinking? Why do I always sneeze five times in a row – never four, never six?

Dr Karl answers these questions and more, on triple j mornings with Tyrone Pynor.

Where do double yolkers come from? Why is it so hard to shake the common cold? Why does tiredness effect our perception of time and speed?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Why can't we just make ozone in a lab to replenish what has been lost due to climate change? Is it okay to microwave food twice? What's the best life advice Dr Karl has been given?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Today Dr Lucy and Dr Karl are joined by special guest astrophysicist Professor Geraint Lewis to answer all your questions from around the cosmos.

Can you get moonburnt? Could we ever move at the speed of light? How did the big bang happen? What's on the other side of the universe?

Dr Karl and Professor Geraint Lewis answer these questions and more on triple j Mornings with Lucy Smith.

It's the most triggering question for your local finance bro - why can't we just print more money? How does our brain know when to kick in and smell things? And why doesn't salt water freeze?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Are some mushrooms infinite? Why does chopping onions make us cry? What would happen if you ate a venomous spider?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Is there a difference between a raised heart rate from an energy drink compared to excercise? If we didn't have high tides or low tides, what effect would that have on Earth? Why can some people wiggle their ears without touching them?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Skim milk vs full cream? Is a Keto diet sustainable for your body? Can being pregnant eliminate a gluten intolerance?

Dr Karl & Lucy Smith are joined by Professor of nutrition and dietetics, Clare Collins to answers these questions and more, on triple j Mornings.

How does glue work? Does the ocean evaporate? Is there an everlasting supply of lava?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

How do clouds work? Will carrots turn you orange? Do our hair and nails keep growing after we die?

Dr Karl answers these questions and more, on triple j Mornings.

Why does our skin dry out more in winter? If you were born deaf and blind, how would you think? And is sparkling water just as hydrating as regular water? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Why do ice cubes taste different to water? Do men have worse smelling urine than women? Is showering too often bad for your skin?

Dr Karl answers these questions and more, on triple j Mornings.

What can you do to prevent sleep paralysis? When a sneeze disappears, where does it go? Why do carnivorous plants exist?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

When is the best time to freeze bread? How do we measure lightyears? Are sugar-free energy drinks worse for you than their sugary counterparts?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

Why does the gym make me gassy? Do bugs have blood types? Does sound travel further at the beach?

Dr Karl answers these questions and more, on triple j Mornings with Lucy Smith.

What would we do if a giant comet was hurdling towards Earth?

Is it possible to be too healthy? What happens if we're busting to wee and hold it? Do men get sleepier than women after sex?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

How do they predict sunrise and sunset so accurately? Why do people often crave sweet things after dinner? Does hot water actually freeze quicker than cold?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Do people with bigger noses have a better sense of smell? Why do we like hot showers so much? Do you need to pay back a sleep debt if you stay up late and wake up early?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Why do we crave certain foods even if it's been years since we last ate them? Why do giraffe's have blue tongues? We know black holes exist, but do are there also white holes?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Why do rainbows form in perfect arcs across the sky? Why does drinking water after eating a mint make the water feel so much colder in your mouth? Is handwriting hereditary?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

What role do genetics play in determining how smart someone will be? Why are rainbows always the same shape and colour? And where do the vitamins in fruit and vegetables come from?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Why do we sometimes cry when we're happy? Can trees live forever? How do reflections actually work?

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

How are seedless fruits grown? Why are peanuts the most common allergen? Can painkillers target specific parts of the body?

Dr Karl answers your science questions on triple j mornings with Lucy Smith.

How can you keep coffee hotter for longer? What's the purpose of fingernails? Can birds get struck by lighting?

Dr Karl answers your science questions on triple j mornings with Lucy Smith.