What the Deepest Spot in the Ocean Sounds Like

It turns out the ocean is one noisy, riotous place, teeming with the sound of seismic temblors, whale songs and ship propellers — even at the deepest ocean trench. Researchers at the National Oceanic and Atmospheric Administration (NOAA) sent an underwater microphone nearly 36,000 feet (10,972 meters) below the water's surface into the Challenger Deep trough in the Mariana Trench, the deepest spot in the ocean. "You would think that the deepest part of the ocean would be one of the quietes