Why do aeroplanes leave lines in the sky?
By 
Kit Chapman2026-06-18T06:00:00
Debunk conspiracies and discover the chemistry behind contrails, suction toilets and infamous airline food
Why do aeroplanes leave lines in the sky? What happens when you poo on a plane? And why does airline food taste strange when you’re back on the ground? Before your imagination takes flight, come back to earth and explore the chemistry behind common aeroplane myths and familiar in-flight experiences.
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