Mollusks add daily to the margins of their shells, producing intricate patterns prized by beachcombers. Though this seems complex, the process can actually be explained by a simple network of nerve cells that sense or "taste" yesterday's shell layer in order to build today's. In essence, seashell patterns are a hard copy of a snail's memories. To prove it, researchers created a computer program that re-creates the patterns seen in seashells.
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