Dr Karl
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Triple J Science Questions

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Next up on the Radio

  • Wednesday 13th December 2017
    10:30 am - 11:00 am

    Dr Karl joins Nicole Dyer on ABC Gold Coast

  • Wednesday 13th December 2017
    11:30 am - 12:00 pm

    Dr Karl joins Phil Staley on ABC Cairns

  • Thursday 14th December 2017
    11:00 am - 12:00 pm

    Dr Karl joins Zan Rowe on ABC Triple J Science on Mornings

  • Thursday 14th December 2017
    2:00 pm - 3:00 pm

    Dr Karl joins Rhod Sharp on BBC Radio 5


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Great Moments in Science

How a common chemical in sunscreen damages coral reefs

GREAT MOMENTS IN SCIENCE: People need to avoid skin damage when they go to the beach, but many sunscreens include oxybenzone, but that’s bad news for coral, explains Dr Karl.

Great Moments in Science

How lightning happens: a step-by-step guide

GREAT MOMENTS IN SCIENCE: It takes a unique series of weather factors to create the awesome power of lightning, explains Dr Karl.


Great Moments in Science

Surprising Sun facts

GREAT MOMENTS IN SCIENCE: Did you know our Sun has long-lost siblings? Dr Karl runs through some surprising facts about that big ball of nuclear energy in the sky.

What's the story with fat? Great Moments in Science

What’s the story with fat?

GREAT MOMENTS IN SCIENCE: Where does fat go when you put it on, and where does it go when you’re getting rid of it? Dr Karl has some unexpected answers to these questions.