20 minutes | Apr 25th 2017

1 - A Call from the Deep

In 1997, ocean researchers listening for the sound of underwater volcanoes accidentally recorded something they had never heard before. The noise, which they dubbed the “bloop,” was the loudest sound ever recorded under the sea, and it was an unexplained mystery for nearly 20 years.  See acast.com/privacy for privacy and opt-out information.
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