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Next up on the Radio
Wednesday 16th September 2026
9:30 am - 10:00 amWednesday 16th September 2026
7:00 pm - 7:30 pmDr Karl joins Kelly Higgins-Devine on ABC Brisbane/Queensland
Thursday 17th September 2026
11:00 am - 12:00 pmDr Karl joins Lucy Smith on ABC Triple J Science Mornings
Thursday 17th September 2026
2:00 pm - 2:30 pmDr Karl joins Joel Rheinberger on ABC Hobart
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Travelers constipation, freckles and dark energy
What is traveler’s constipation? Why do I have freckles? How do black holes effect dark energy? Dr Karl answers these questions and more, with host Linda Marigliano on triple j Mornings.
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Celebrating 30 years of science talkback with Dr Karl
Previous ‘Mornings’ presenters drop by to share their favourite Dr Karl moments from the last 30 years on triplej. Plus: Karl’s favourite organ; his first comments on radio re-enacted; and the five most-common science questions asked by listeners.
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Moon landing, fat birds, brighter LEDs
Why don’t birds have fat legs? Why are LED lights brighter then ever? Was the moon landing real? Dr Karl answers these questions and more on triple j Mornings with host Lucy Smith.
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Seeing spots, white rainbows and ghosts
Why do some people see thousands of tiny spots when they look up at the sky or a bright light? What causes a white rainbow? And is there any science to explain ghosts?
