This Science Queeries episode goes deep – over a kilometre down below an old gold mine in an underground physics laboratory. Dr Cat chats to Dr Theresa Fruth, an astroparticle physicist at The University of Sydney who is helping to make elusive, undetectable dark matter detectable. We can’t observe dark matter at all – yet it makes up most of the universe. It takes international collaborations and sterile laboratories way deep, deep down to give us hope of ever being able to directly detect it.

Originally aired 5th August, 2025.

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