Dangerous EarthNovember 10, 2016

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 them, we can now capture exactly what happens as snow transforms into a deadly and unpredictable danger.

Dangerous Earth was broadcast on BBC4 at Tuesday 1 August 2017, 07:28. This episode was initially placed on Thursday 10 November 2016.