Flight at the Edge of the Ozone Layer

A Perlan glider uses air rising over the southern Andes to reach record heights and allow scientists to study the ozone layer. Images from the show "One Strange Rock".

The effects of air travel on the human body

Is there a human cost to being able to jet off at will? Alas, it’s not exactly the healthiest thing you can do — and it’s worth knowing  the toll it takes on the human body.

The surprising science behind in-flight meals

Malaysia-based airline AirAsia has opened a restaurant in Kuala Lumpur that sells its in-flight meals. But why does food often taste so different in the skies?

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