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Science

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DetlefK

(16,670 posts)
Tue Jul 12, 2016, 03:46 AM Jul 2016

Dinosaurs didn't roar. They hummed. [View all]

http://gizmodo.com/dinosaurs-more-likely-cooed-than-roared-1783475658

Researchers from the University of Texas did a comprehensive review of the vocal organs of birds and the kinds of sounds they made. Then they matched those up with the vocal organs found in fossilized dinosaurs for a paper coming out next month in Evolution. The results, they say, suggest that many dinosaurs were far more likely to vocalize with a closed-mouth—perhaps, a disapproving “hmm” or a more pensive “umm”—than with a full-throated roar.




Now, if you think that a bird cannot sound threatening...





An for comparison an alligator:

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