Earth’s deep interior may hold water equal to today’s oceans, challenging long-held views of how the planet became habitable.

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 ...

Some 4.6 billion years ago, Earth was nothing like the gentle blue planet we know today. Frequent and violent celestial impacts churned its surface and interior into a seething ocean of magma—an ...

Scientists uncover how ancient ocean salt controlled carbon storage and shaped global temperatures at the end of the last ice ...