Journey into an Icelandic volcano

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Dr Freysteinn Sigmundsson, a geophysicist at the University of Iceland and a co-leader of the FutureVolc project shows the BBC's Neil Bowdler around the dormant Thrihnukagigur volcano in Iceland.

They head down into the volcano on a cradle and see the magma-filled crack where magma forced its way up through the Earth's crust 5000 years ago, carving out a unique volcanic chamber.

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