Physics and RoTK??!

[Inziladun]

Originally Posted by Lotrelf

I don't think you need to be a Physics expert for this. Eagles were Divine creatures; and they wouldn't be affected by the poisonous air, heat, and other harmful stuff caused by the Lava. How do you think Frodo and Survived who were kind of weaker than the Eagles??

I would think the Eagles susceptible to the same things as other truly embodied spirits like the Istari and Ents. The poisonous air of Mordor would have had two sources: smoke from Mt. Doom and the "reek" of whatever industrial or sorcerous activities Sauron had been up to. The pollution would not have been present in all the air, but in layers. The Eagles could find a relatively clean slot in which to do most of their flying, probably. Short term exposure to the fumes when moving through layers shouldn't have been too harmful.