David Attenborough explores the extraordinary ways that animals hear and produce sound, and the crucial role sound plays in the lives of animals around the globe – from birth to surviving adulthood and finding a mate.
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http://www.rarefile.net/ltxpwdjk57oc/SecretWorldOfSound.S01E01.mp4
http://www.rarefile.net/9kfj6sh1we7o/SecretWorldOfSound.S01E02.mp4
http://www.rarefile.net/htgbj2j0msgx/SecretWorldOfSound.S01E03.mp4
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