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| David M. Schwartz, "Snatching scientific secrets from the hippo's gaping jaws," Smithsonian, XXVI (March, 1996), 90-102. Cover story. Researcher William Barklow has been studying the hippo's unique vocalizations for eight years. His preliminary findings indicate that hippos can produce and hear sounds in both air and water simultaneously. Illustrated. BONUS: Visit the official Smithsonian magazine website for this article. Includes stills, sounds, and videos. |
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