Date: 07 September 2011
Dolphins "talk" to each other, using the same process to make their high-pitched sounds as humans, according to a new analysis of results from a 1970s experiment.
The findings mean dolphins don't actually whistle as has been long thought, but instead rely on vibrations of tissues in their nasal cavities that are analogous to our vocal cords.
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http://www.livescience.com/15928-dolphins-whistles-talk-humans.html
