More than 80 percent of the world’s oceans remain unmapped and unobserved, according to NOAA. Since the 1990s, a network of hydrophones originally built to monitor nuclear weapons testing has picked ...

For decades, strange sounds rising from the deepest parts of the ocean have left scientists searching for answers. Some were eventually linked to shifting ice, underwater volcanoes, and earthquakes, ...

Far beneath the surface of the ocean, scientists have recorded strange and powerful sounds unlike anything ever officially identified. Some noises traveled across thousands of miles underwater, while ...

How deep is the deepest ocean—and how precisely can we actually measure it? A Japanese research team led by the National ...

Using this model, the maximum depths of the western, central, and eastern basins were 10,926 m, 10,912 m, and 10,927 m, respectively. The study therefore gives 10,927 m as its preferred estimate of ...