Microbial diversity below seafloor is as rich as on Earth's surface

For the first time, researchers have mapped the biological diversity of marine sediment, one of Earth's largest global biomes. Although marine sediment covers 70% of the Earth's surface, little was known about its global patterns of microbial diversity.

source https://phys.org/news/2020-10-microbial-diversity-seafloor-rich-earth.html