2. Volcano

Helen looks at volcanoes. With shocking eyewitness footage of eruptions, and new thermal imagery and ultra-high speed photography, we can now capture on camera the complex proce ...

19-02-2026

BBC 4

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6. Iceberg

12-01-2026

BBC 4

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5. Tornado

22-03-2025

BBC 4

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1. Avalanche

Dr Helen Czerski looks at the anatomy of an avalanche. From shocking eyewitness footage from within an avalanche, to detailed CT scans showing the microscopic changes that cause ...

30-01-2025

BBC 4

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4. Aurora

24-10-2022

BBC 4

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3. Lightning

24-10-2022

BBC 4

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