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Sound analysis hints sirens have an evolutionary link with wolf howls

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The New York Times
SOURCE: https://www.newscientist.com/article/2254705-sound-analysis-hints-sirens-have-an-evolutionary-link-with-wolf-howls/
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Summary

Wolf howls may have served as a danger signal to our ancestors ? and modern emergency sirens may be an effective way to alert us because they sound like howls

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