10 Things You Didn't Know About...
BBC FOUR
Wednesday 4 January 2017 20:00 - 21:00 (60 mins)
...Avalanches. 3/4. Iain Stewart reveals ten remarkable stories about avalanches, including how the deadliest one killed 18,000 people in three minutes. [AD,S]
10 Things You Didn't Know About... may be available on playback
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