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We're at university together <a href=" http://www.hurricanemedia.co.uk/progenis-cena.pdf ">progenis czy pbkm</a> Like all toothed whales, the Yangtze finless porpoise does not have external ears. Instead, it hears when sound reverberates through its head, throat, jaw and acoustic fat within the mandible. In order to better understand the process of hearing and how excess sound might affect this species, the researchers conducted hearing examinations on two Yangtze finless porpoises. Originally from the wild, these finless porpoises have since been brought to reside at the Institute of Hydrobiology in Wuhan.