The Telltale Click

Published: Sept. 25, 2018, 4 a.m.

Distant relatives of both dolphins and whales,\xa0hippos may also use sound to echolocate. Our GDPR privacy policy was updated on August 8, 2022. Visit acast.com/privacy for more information.\nLearn more about your ad choices. Visit megaphone.fm/adchoices