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Next up on the Radio
Wednesday 28th October 2026
9:30 am - 10:00 amWednesday 28th October 2026
7:00 pm - 7:30 pmDr Karl joins Kelly Higgins-Devine on ABC Brisbane/Queensland
Thursday 29th October 2026
11:00 am - 12:00 pmDr Karl joins Lucy Smith on ABC Triple J Science Mornings
Thursday 29th October 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 Which way does water go down a drain?
Dr Karl investigates if water really drains anti-clockwise in the Northern Hemisphere and clockwise Down Under. DOES WATER EMPTY down a drain hole anti-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere? The answer is – kind of, and sometimes. As a cyclone moves away from the equator, it spins clockwise in the […]
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Soft copper, blue tyres and compression pants
Can copper pipes be made hard again after they have been overheated then cooled? Why do new tyres sometimes leave a blue mark on the ground? Do sports compression shorts work?
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The perfect hot chocolate, body hair length, snorting
How do you make the perfect hot chocolate? Does snorting things destroy your sense of smell? What are the particles of atoms made of?
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Visual snow, dripping taps, waking up grumpy
What’s ‘visual snow’? Why will a dripping tap wake you up but torrential rain won’t? Why do some people wake up grumpy?
