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The Guardian - UK
The Guardian - UK
Lifestyle

At what point does the air around us become the sky above us?

Sea, air and sky ... Slieve Donard, Mourne Mountains, Northern Ireland.
Sea, air and sky ... Slieve Donard, Mourne Mountains, Northern Ireland. Photograph: Paul Lindsay/Alamy Photograph: Paul Lindsay/Alamy Stock Photo

At what point does the air around us become the sky above us?

Rosa Aers, Newcastle upon Tyne

Post your answers – and new questions – below or email them to nq@theguardian.com

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