Wed Feb 24, 2010 6:02 pm by earthforce_1
I was wondering about the floating mountains. At first I thought they were ludicrously impossible by all known laws of physics. Eventually I was able to come up with a scenario to explain them:
The mountains are made of very light, low density material with the consistency of styrafoam. It was mentioned the Na'vi had skeletons of naturally occurring carbon fibres; perhaps the floating rocks are largely made of a similar material, making them extremely strong, but light.
That would not be enough to have them float in Earth's atmosphere, but if Pandora's atmosphere was largely composed of a very dense gas such as sulfur hexafloride it would be possible. Check out YouTube to see the properties of the stuff, it is really quite cool. That also explains why humans have to wear masks on Pandora. Sulfur hexafloride is not poisonous; but it isn't breathable either, although people can inhale it and do the reverse of the "helium voice" thing.
I haven't found a way to explain how the floating mountains would have waterfalls yet; unless the vines tethering them to the planet pipe water under some sort of active transport system.
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