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Eavesdropping
November 20, 2007MIT/WHOI graduate student Ari Shapiro takes a break from listening to the vocalizations of narwhals. His computer screen shows a spectrograma plot of sound frequency versus time of one of the Shapiro and colleagues found evidence that narwhals produce certain vocal signatures to help them recognize and reunite with family members nearby and at a distance. (Photo by Tom Kleindinst, Woods Hole Oceanographic Institution)
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