The water vapour rises into the air. Rain water runs over the land and collects in lakes or rivers, which take it back to the sea. The cycle starts all over again. Image caption, The water cycle ...

Astronomers found water vapour equal to 3 Earth oceans in HL Tauri’s disk—offering rare insight into planet birth, cosmic ...

At the U.S. Global Survey website, an image shows ... "thin film" of water on the surface. Some fast facts: About 3,100 mi 3 (12,900 km 3) of water, mostly in the form of water vapor, is in ...

some of the liquid water turns into a clear colourless gas called water vapour, and mixes with the air. This process is called evaporation. Evaporation can happen to any liquid water, not just ...