About 700 million years ago, Earth was entombed in a veneer of ice hundreds of feet thick—a frozen state scientists refer to ...
Our planet is unique for its ability to sustain abundant life. From studies of the rock record, scientists believe life had already emerged on Earth at least 3.5 billion years ago and probably much ...
Far below the ocean’s surface, a hidden circulation system quietly shapes life on Earth. Dense “deep ocean water” formed in just a few remote seas helps drive a global conveyor that redistributes heat ...