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Next up on the Radio
Thursday 20th August 2026
11:00 am - 12:00 pmThursday 20th August 2026
2:00 pm - 2:30 pmDr Karl joins Joel Rheinberger on ABC Hobart
Thursday 20th August 2026
2:30 pm - 3:00 pmDr Karl joins Alice Matthews on ABC Canberra
Thursday 20th August 2026
2:30 pm - 3:00 pmDr Karl joins Jess Ong on ABC Darwin
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Australian Geographic Need to know: Bird poo hue
Why is most bird poo white, even though birds eat food of many different colours? The answer has two parts. One is that birds have to get rid of excess nitrogen in their diet. The other is that bird poo does actually come in different colours. Nitrogen is an element in all proteins. Sometimes there […]
National Geographic Kids Cicadas of Summer
Dr Karl explores the wonderful world of cicadas. Have you ever heard the chorus of cicadas in summer? They can be very loud! This is because there are so many of them, singing together like a big insect choir! Cicadas can be heard in most parts of the world. Each species has its own special […]
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Free electricity, sweaty palms and lion allergies
If you wrapped a wire around the world would you generate electricity? How does my partner make her hands sweat on cue? And if I’m allergic to housecats, would I be allergic to a lion?
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Hungry sneezing, remarkable redheads and the Tay Tay debate
What would happen if the whole world farted at once? Why do we hear our own voice differently to how others hear us? Can you scare someone better?
