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Next up on the Radio

  • Wednesday 18th February 2026
    9:30 am - 10:00 am

    Dr Karl joins Sarah Cumming on ABC Gold Coast

  • Wednesday 18th February 2026
    7:00 pm - 7:30 pm

    Dr Karl joins Kelly Higgins-Devine on ABC Brisbane/Queensland

  • Thursday 19th February 2026
    11:00 am - 12:00 pm

    Dr Karl joins Lucy Smith on ABC Triple J Science Mornings

  • Thursday 19th February 2026
    2:00 pm - 2:30 pm

    Dr Karl joins Joel Rheinberger on ABC Hobart


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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.

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Itchy mouths, floating poo and stomach memory

Can you overcome gluten intolerance? Is toasted bread good for you? Should your poo sink or float?


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Emotional chords, hungover libido, forced smiles

Does forcing a smile really make you happier? Why do certain notes or chords have emotional responses? Is urine good for helping lemon trees grow?

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Sex, multiple orgasms and curing a morning glory

As part of triplej’s ‘sex week’, Dr Karl and Zan Rowe take talkback questions ranging from female ‘squirting’ to male morning glories and having sex during pregnancy.