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Next up on the Radio
Wednesday 4th February 2026
9:30 am - 10:00 amWednesday 4th February 2026
7:00 pm - 7:30 pmDr Karl joins Kelly Higgins-Devine on ABC Brisbane/Queensland
Thursday 5th February 2026
11:00 am - 12:00 pmDr Karl joins Lucy Smith on ABC Triple J Science Mornings
Thursday 5th February 2026
2:00 pm - 2:30 pmDr Karl joins Joel Rheinberger on ABC Hobart
Latest Books
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Recent Articles & Stories
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Australian Geographic The Science Behind the Tides
There are about 120 different possible tides each day. There are tides that happen once a day, twice a day, three times a day, four times a day, and so on. THE TOWN OF Karumba – at the Gulf of Carpentaria’s bottom right-hand corner – experiences only one high tide and one low tide each […]
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Farmer's tales, shaved-head hair, and quantum physics and God
What happens when fruit and vegetables cross-pollinate? Why does my hair appear to grow quicker now I shave my head? Does quantum physics imply the existence of a God?
National Geographic Kids I Can See A Rainbow!
Dr Karl explores the magic of a rainbow. We love a good rainbow. But did you know that not all look the same? Some can be brilliantly bright and colourful and some can appear faint or dull. So when can you see the best ones? The clearest appear when the sun is shining brightly behind […]
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Corn in poo, Keto diets and cancer causing meats
Why do some farts smell and some don’t? What are so many people developing gluten intolerance? Can you ever be 100% healthy with food? In this food and nutrition special, Dr Karl answers these questions and more with special guests dietitian Dr Kyra Sim and USA nutrition expert Yvette d’Entremont.
