Stare out into the grand expense of the ocean, and it can truly seem endless. Although oceans appear vast and uniform, ...

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

Understanding how water moves through the Earth system is fundamental to predicting climate impacts and ensuring sustainable ...

At extreme pressures and temperatures, water becomes superionic — a solid that behaves partly like a liquid and conducts ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

Worldwide, millions of people live in river deltas that are sinking faster than sea levels are rising, research suggests.

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

New climate modeling suggests that small lakes on ancient Mars could have stayed liquid for decades, even in a generally cold environment. Small lakes on early Mars may have stayed in liquid form for ...

On a Bahamian island, in a landlocked lagoon, the planet’s densest collection of seahorses is offering scientists new ...

A high-resolution groundwater map shows how underground water varies across the U.S., with new insights for agriculture and ...

Under extreme planetary conditions, water turns into a strange, electricity-conducting solid hidden deep inside giant planets.