1. Gravity/Equilibrium/Surface Tension & Hydrostatic pressure2....

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    1. Gravity/Equilibrium/Surface Tension & Hydrostatic pressure
    2. The are not, they just appear to be due to: Wind Speed Variability/Distance Perception/Cloud Type/Atmospheric Stability/Local Conditions
    3. Large Scale/Local Terrain/Limited Field of View/Height Perspective/Visual Illusions
 
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