The Earth’s deep-sea trenches are some of the least explored places on Earth—as they are very difficult to access, are pitch black and the pressure is extremely high. Collecting samples and making reliable measurements of the processes that regulate the turnover of organic material in the deep is therefore difficult.
Click here for original story, Disproportionately large amounts of carbon accumulate at the bottom of deep-sea trenches, research shows
Source: Phys.org