When Quaritch organizes a pre-emptive strike against the Tree of Souls, the mountains were floating on their own while the RDA vehicles needed engines to fly, why?


1 Answer 1


The Hallelujah mountains float because they're essentially large chunks of unobtainium, which is a room temperature superconductor, thus subject to the Meissner Effect. This causes superconductors to "levitate" in the presence of certain strong magnetic fields: Image of a supercooled "high-temperature superconductor" levitating above a magnet.

Vehicles need engines to fly because gravity and the laws of thermodynamics still exist in the Avatar universe. So vehicles still need a power source for propulsion and can't defy gravity for no apparent reason.

  • 2
    although - looking at the size of the shuttle in the movie, it must surely use some unobtainium to help with lift...
    – HorusKol
    Oct 29, 2013 at 1:17
  • 3
    @HorusKol Nah, just some futuristic power supply with unheard-of energy density & some futuristic engines with unheard of thrust-to-weight ratios.
    – Wingman4l7
    Nov 21, 2013 at 7:19

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