The global water cycle describes the circulation of water—a vital and dynamic substance—in its liquid, solid, and vapor phases as it moves through the atmosphere, the land, and the rivers, lakes, and ...

Could there be an ocean buried deep beneath our feet, hidden some 700 kilometers below the Earth’s surface? If the recent discoveries from scientific teams in Brazil and Botswana are to be believed, ...

Early Earth got much of its water from relentless bombardment by water-rich asteroids and icy comets. Now, scientists say the young planet had a way to hold onto much more of that water than once ...