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Next up on the Radio
Wednesday 8th July 2026
9:30 am - 10:00 amWednesday 8th July 2026
7:00 pm - 7:30 pmDr Karl joins Kelly Higgins-Devine on ABC Brisbane/Queensland
Thursday 9th July 2026
11:00 am - 12:00 pmDr Karl joins Lucy Smith on ABC Triple J Science Mornings
Thursday 9th July 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 fate of our first submarine
Dr Karl tells the story of Australia’s first submarine in World War One, the AE2. ON 31 DECEMBER, 1914, AE2 Australia’s only submarine (AE1 had been lost at sea off New Guinea two months earlier), sailed from Australia towards the Dardanelles. The plan was to trailblaze a path for the Allied fleet into the inland […]
National Geographic Kids How Much Does a Cloud Weigh?
A cloud is made up of many, many tiny ‘clumps’ of water, either liquid or frozen. The liquid droplets are about 0.002mm across – smaller than the thickness of a human hair. Some of these tiny droplets are so small that it would take a million of them to make a single raindrop! Different clouds […]
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Swallowing chewing gum, taste buds and drinking milk
What happens if you swallow chewing gum? Plus: can a woman’s tastebuds change during and after pregnancy?; and can drinking milk cause osteoporosis?
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Decapitation, shocks, micro-dosing
What happens when we run out of oil? How long does the human brain last? How do anaesthetics knock us out? Dr Karl answers these questions and more on triple j Mornings, with host Lucy Smith.
