Corrected entry: SPOILER: In the film's final scene, Thomas has made it to the mountaintop, and although it's supposed to be extremely cold, and even though he's bundled up to the hilt, there's not the slightest hint of steam emanating from his mouth or nose when he breathes.
www.translingua.com.mx
27th Jan 2008
Correction: Visible breath has not so much to do with cold as it has to do with air humidity. Both have to be just right for breath to appear as vapour. At the top of the Himalayas, it is so cold that the air humidity is next to nil, therefore no breath is visible.
Twotall