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Clarification

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Posted by Harvey on July 10, 2001 19:22:18 UTC

Alex,

Here is a correction/clarification of what you said:

>>>there were fish around, and some specie of fish from which dolphins evolved. Most likely this specie had good hearing abilities (many fish communicate by ultrasound) and some of them may have noticed that if their "clicks" quickly echoes back, soon after continuing to move in echo direction they find an obstacle or some other object (food, predator, etc.).

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