Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have ...

Time, water, and geologic forces have converged to create underwater sinkholes where oxygen-poor and sulfur-rich groundwater support prolific microbial mats resembling life on early Earth.

which cover the bottom of the lake in blobs known as microbial mats. Many of these organisms are photosynthetic, giving the lake a high concentration of dissolved oxygen. Some of the mats formed ...

Scientists report the discovery of a thriving ecosystem of organisms beneath 14 meters of ice covering Antarctica's frozen ...