About 700 million years ago, Earth was entombed in a veneer of ice hundreds of feet thick—a frozen state scientists refer to ...

Pioneering marine biologist Sylvia Earle grew up along the sea—the right place for the right person to begin a prolific career built on exploring and protecting the ocean. To date, Earle has led more ...

3.8 billion years ago, when the Earth’s temperature cooled down, rain fell for centuries. Oceans formed. Longer than human history, the creation of oceans—all this water that we can float on, fly over ...