Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. It is vital for all known forms of life, despite providing neither food, energy, nor organic micronutrients. Its chemical formula, H₂O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H₂O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water covers about 71% of the Earth's surface, mostly in seas and oceans.

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Diamond From 660 Kilometers Below Earth's Surface Reveals a Water-Rich Environment

Ultra Rare Diamond Suggests Earth's Mantle Has an Ocean's Worth of Water

50 million tons of water vapor from Tonga's eruption could warm Earth for years

Japan Space Probe Discovers Water in an Asteroid

The Tonga Eruption's 50 Million Tons of Water Vapor May Warm Earth For Months to Come

50 million tons of water vapor from Tonga's eruption could warm Earth for years

Water found in asteroid dust may offer clues to origins of life on Earth | Discovery offers new support for the theory that life may have been seeded from outer space

Specks of dust retrieved by a Japanese space probe from an asteroid some 300 million kilometres from Earth have revealed a surprising component: a drop of water, scientists said Friday

An integrated modeling framework to assess surface and ground water resources

A sea change for plastic pollution: New material biodegrades in ocean water

Extraterrestrial water has been found inside a UK meteorite, and the composition of the water is very, very similar to the water in the Earth’s oceans

Rooftop solar cells can be a boon for water conservation too

Scientists blasted plastic with lasers and turned it into tiny diamonds and a new type of water

Five years after water crisis, 1 in 5 Flint, Michigan residents has PTSD

Extra-terrestrial water was discovered in a meteorite for the first time ever

Extra-terrestrial water found for first time in meteorite that landed in UK | The meteorite crashed into a driveway in the Gloucestershire town of Winchcombe last February and is believed to hold clues about where the water in the Earth's vast oceans came from.