The symetriade is now stabilized, although it continues to evolve slowly. It justifies then its name because the whole structure divides in two absolutely identical and opposite parts in a symmetric way. The size of such formations is very variable, the smallest symetriades stand only eight hundred meters high while the biggest can reach several kilometers high. The most extraordinary particuliarity of symetriades is their faculty to model or even to deny some laws of the physics.

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