Add Yahoo as a preferred source to see more of our stories on Google. Could the source of a mysterious "bloop" sound be an unknown sea creature? In 1997, the U.S. National Oceanic and Atmospheric ...

Here’s what you’ll learn when you read this story: In 1997, NOAA researchers recorded a mysterious ultra-low-frequency sound powerful enough to cross the entire Pacific Ocean. The sound’s frequency ...

The ocean covers more than 70% of Earth’s surface, yet humans have explored only 5% of its vast depths. This makes our planet’s waters the ultimate frontier — a realm where bizarre creatures lurk in ...