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Understanding predictability, randomness by digging in the dirt

When tilling soil, the blade of the tool cuts through dirt, loosening it in preparation for seeding. The dirt granules are pushed aside in a way that looks random — but might not be. Now, researchers have found a way to distinguish whether such a process is truly random, or is actually deterministic — which can lead to deeper understanding and the ability to control the process.

(via WSJ)