Ice is water frozen into a solid state. Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color.

In the Solar System, ice is abundant and occurs naturally from as close to the Sun as Mercury to as far as the Oort cloud. Beyond the Solar System, it occurs as interstellar ice. It is abundant on Earth's surface  particularly in the polar regions and above the snow line  and, as a common form of precipitation and deposition, plays a key role in Earth's water cycle and climate. It falls as snowflakes and hail or occurs as frost, icicles or ice spikes.

Ice molecules can exhibit up to sixteen different phases (packing geometries) that depend on temperature and pressure. When water is cooled rapidly (quenching), up to three different types of amorphous ice can form depending on the history of its pressure and temperature. When cooled slowly correlated proton tunneling occurs below 20 K giving rise to macroscopic quantum phenomena. Virtually all the ice on Earth's surface and in its atmosphere is of a hexagonal crystalline structure denoted as ice Ih (spoken as "ice one h") with minute traces of cubic ice denoted as ice Ic. The most common phase transition to ice Ih occurs when liquid water is cooled below 0°C (273.15K, 32°F) at standard atmospheric pressure. It may also be deposited directly by water vapor, as happens in the formation of frost. The transition from ice to water is melting and from ice directly to water vapor is sublimation.

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Latest News for: Discovery water


Summer rains likely contributed to human remains’ discovery

The Kentucky Standard 03 Aug 2020
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Valley City Times Record 03 Aug 2020
... US in the 1980s, originating from the discharge of ballast water in the Great Lakes ... The first discovery of Zebra Mussels in North Dakota was in the waters of the Kidder Dam at Wahpeton in 2010....
photo: AP / Adrian Narine
File - People line up to vote in presidential elections in Georgetown, Guyana, Monday, March. 2, 2020.

Guyana swears in Irfaan Ali as president after long stand-off

BBC News 03 Aug 2020
The election was the first to be held after the US oil giant Exxon made one of the world's biggest discoveries of oil in deep waters off Guyana's coast. The discovery could put Guyana among the world's top oil producers and is expected to massively boost its economy ... the discovery....

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PhysOrg 03 Aug 2020
... through electrolysis, the process of splitting water with electricity....

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Popular Science 03 Aug 2020
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The Energy Bulletin Weekly 3 August 2020

Resilience 03 Aug 2020
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The Wrap 31 Jul 2020
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Hastings Tribune 31 Jul 2020
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Cumberland Mountain State Park hosting 47 events through Aug. 8

Crossville Chronicle 31 Jul 2020
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New current that transports water to major 'waterfall' discovered in deep ocean

PhysOrg 30 Jul 2020
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NASA set to launch robotic rover to seek signs of past Martian life

China Daily 30 Jul 2020
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Stamp Well activities haven’t violated agreement, Longmont staff tells City Council

Colorado Daily 30 Jul 2020
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