concept

Lift

The upward force a wing generates by throwing air downward: the air, shoved down, pushes the wing up. How much lift a wing makes depends on its area, on the square of the speed it slices through the air, and — crucial to the banshee story — on the density of the air itself. Denser air means the same wing at the same speed makes more lift. This is why Pandora's thick atmosphere holds up giant fliers more easily than Earth's thin sky.