Art of making things complex

Theory says that ants will always find the shortest route to a food source. Why? Imagine that two ants leave the nest in search of food at the same time, each taking a different path. Both leave some chemical markers to trace the path they have taken when they return to their nests. The ant that located a source of food nearest to the nest would obviously return first and, as is its custom, would leave those chemical markers on the way back too.

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