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The penis bone: the treasure that evolution denied us
Josep María Mainat
12-08-2025
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![A dog's penis, with the baculum (penial bone) visible. The arrow indicates the urethral groove.](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 9"%3E%3C/svg%3E)