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19/05/2013

Selection of BBC World Service Programmes BBC Radio 4 joins the BBC World Service.

Thin Air

Gabrielle Walker explores how Earth's atmosphere both sustains and destroys life and discovers surprises in how it does so.
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Episode 3

3/3 Gabrielle Walker explores Earth's protecting veil, the upper atmosphere.

Wed 26 Jan 2011 21:00 BBC Radio 4

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