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Original Dune
This article or section refers to elements from Original Dune.

Wormsign is tell-tale signals that a sandworm was approaching during spice mining on the planet Arrakis. It usually manifested itself as static charges on the surface of sand dunes. Also when the worm reaches a shallow depth, there is a sign of a bulge or surge in the sands.

The observation of wormsign usually meant that a sandworm's estimated time of arrival could be calculated.

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