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Sunday, 26 July 2015
Dolphins "Shout" to Be Heard over Boat Noise
And they expend energy to do so
-- Read more on ScientificAmerican.com
July 26, 2015 at 02:00PM
via Scientific American Content: Global http://ift.tt/1J6WM5s http://ift.tt/n8vNiX http://ift.tt/1OfOnMt
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