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: Water discovery


Comets may have seeded Earth with life-supporting carbon

Engadget 08 Mar 2021
NASA's airborne telescope has made another major discovery just months after it confirmed the presence of water on the Moon's sunlit surfaces. SOFIA's latest find relates to the essence left by an icy comet that zipped past Earth in 2016... ....

Weekly Planet: Actions for a toxic-free future

Times Argus 06 Mar 2021
In Vermont, we’ve taken initial steps to address toxic chemicals, spurred on by the alarming discovery of toxic PFAS contamination in the drinking water of some Bennington area residents back in 2016 ... Right now, we regulate five PFAS chemicals in drinking water, but there are an estimated 9,000-plus PFAS chemicals in circulation....

Watch Perseverance rover pulling its first moves on Mars

Digital Trends 05 Mar 2021
Warming up for a marathon of science.” ... Warming up for a marathon of science ... Jezero Crater was once filled with water and so is thought to offer an excellent chance of making such a discovery ... This will allow scientists to examine the material with more powerful instruments to verify any discoveries that the rover makes during its two-year mission ... ....

With no arrests made in drowning deaths of puppies, Cumberland County man works on boosting ...

Penn Live 05 Mar 2021
Enola man Rick Harro was looking for a place to go ice fishing when he uncovered the worst thing he’s ever seen. It was Feb ... “I realized it was a puppy,” Harro said, recalling the discovery. In a circle of water a couple of feet away, he saw several others scattered around. He quickly called the police ... That day, they got 11 out of the water ... Turnpike ... ....

Oxnard police find crocodile during drug bust at waterfront home

ABC7 04 Mar 2021
When Askar's home was searched, police say they found the crocodile "submerged in a poorly secured tank with rancid water." They say the discovery was ......

Mediterranean pipe dream founders on global gas glut

Asiatimes 04 Mar 2021
“Simply put, there’s just too much gas in the world.” ... Source. Agenor Energy/Facebook ... Cyprus’ offshore Aphrodite field, along with other recent discoveries in Cypriot waters, are smaller still ... In addition, Turkey disputes the Cypriot EEZ and has sent its own seismic research and drill ships into what Nicosia claims as its own territorial waters ... .......

Bioinspired materials from dandelions

Phys Dot Org 03 Mar 2021
The air trapping capacity of dandelion clocks submerged in water has been measured in the lab for the first time. The discovery paves the way for the development of new and advanced devices and technologies that could be used in a broad range of applications, for example, to create devices or materials that retain air bubbles under water....

Arizona agency investigates water contamination from base

Rio Rancho Observer 03 Mar 2021
PHOENIX — The Arizona agency that regulates utilities is calling together water companies near Luke Air Force Base in metro Phoenix, where drinking water was found to be contaminated with chemicals commonly found in firefighting foam ... Air Force to start distributing bottled water to thousands of residents and business owners....

Teens find a boot with a foot inside while fishing in Saginaw County

Michigan Live 03 Mar 2021
SAGINAW, MI - Two teenagers who were out fishing in Saginaw County ended up finding something unusual in the water ... 26 ... and E Sloan Rd. in Taymouth Township and made the discovery. The boys saw a shoe in the water and retrieved it, ultimately looking in the shoe and seeing what they believed was a foot inside, according to the sheriff’s office ... ....

Study discusses effect of pollutants on fertility

Hindustan Times 03 Mar 2021
Individuals who lived in the survey area were 6 times less fertile, in comparison to those living in cleaner waters ... They also discovered that individuals who lived in the survey area were 6 times less fertile, in comparison to those living in cleaner waters ... "We normally study the effect of chemicals on species after the water has been treated....

What Happens if Perseverance Finds Life on Mars?

Universe Today 03 Mar 2021
Extraordinary claims require extraordinary evidence, and the discovery that life existed elsewhere in the universe would certainly be extraordinary.'” ... Its atmosphere was denser, its climate warmer, and liquid water flowed on its surface ... 3.5 billion years ago, Jezero was a lakebed that had water flowing into it....

What's on? 10 top telly tips for Wednesday March 3

RTE 03 Mar 2021
Tonight's top telly includes RTÉ Investigates ... . Pick of the Day. RTÉ Investigates ... Don't Miss. The Terror, 9.00pm, BBC Two ... Later, in the second episode of the double-bill, after a long winter trapped in the ice, scouting parties are sent out in search of open water. Then, one of the teams makes a frightening discovery ... ....

Shrimps producing less sperm in polluted waters ‘is warning to humans’

Belfast Telegraph 02 Mar 2021
The discovery that shrimp living in polluted waters produce 70% less sperm is a warning to all species, including humans, according to scientists. Researchers from the University of Portsmouth also found that there were six times less of the sea creatures living in the study area on the south coast of England, compared with cleaner waters....