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The Historyscoper's Science and Technology Watch Blog Apr. 2, 2015

Saturday, August 16, 2014

Dolphins and whales squeal with delight: High-pitched whistles signal happiness of marine mammals


http://www.dailymail.co.uk/sciencetech/article-2724027/Dolphins-whales-squeal-delight-High-pitched-whistles-signal-happiness-marine-mammals.html
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