NASA scientists recreate Mars's spider-shaped geologic formations in lab for the first time
Tests on Earth appear to confirm how the red planet's spider-shaped geologic formations are carved by carbon dioxide.
Tests on Earth appear to confirm how the red planet's spider-shaped geologic formations are carved by carbon dioxide.
Planetary Sciences
12 hours ago
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1
The Amazon rainforest is home to a remarkable variety of plants and animals not found anywhere else on Earth, with some species only located in certain areas, but the reason for this has perplexed and divided scientists for ...
Ecology
14 hours ago
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1
For the second winter in a row, the extent of Antarctic sea ice has been exceptionally below average—and it has just set a new record low for this time of year.
Earth Sciences
Sep 10, 2024
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48
Bacteria use their internal 24-hour clocks to anticipate the arrival of new seasons, according to research carried out with the assistance of an "ice bucket challenge."
Cell & Microbiology
Sep 6, 2024
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1
More than 700 million years ago, the Earth was plunged into a state that geologists call "snowball Earth", when our planet was entirely encased in ice. This happened when the polar ice caps expanded so far that they joined ...
Earth Sciences
Sep 6, 2024
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25
Photosynthesis can take place in nature even at extremely low light levels. This is the result of an international study that investigated the development of Arctic microalgae at the end of the polar night. The measurements ...
Ecology
Sep 4, 2024
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11
It's become a ritual in our family—after a long day at his rowing regatta, my 17-year-old son and I get fast food on the way home. I am sure there are far more nutritious ways to replace the calories he's burned. But I ...
Social Sciences
Sep 4, 2024
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July 22, 2024 was the hottest day in recorded human history, with a global average temperature of 17.16 C.
Environment
Sep 4, 2024
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41
People have observed the bright Martian poles wax and wane for centuries, but only within the last 50 years have scientists discovered that they are mostly comprised of carbon dioxide cycling in and out of the atmosphere ...
Planetary Sciences
Sep 3, 2024
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95
As humans alter the planet's climate and ecosystems, scientists are looking to Earth's history to help predict what may unfold from climate change. To this end, massive ice structures like glaciers serve as nature's freezers, ...
Ecology
Sep 1, 2024
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23
Ice is a solid phase, usually crystalline, of a non-metallic substance that is liquid or gas at room temperature, such as carbon dioxide ice (dry ice), ammonia ice, or methane ice. However, the predominant use of the term ice is for water ice, technically restricted to one of the 15 known crystalline phases of water. In non-scientific contexts, the term usually means ice Ih, which is known to be the most abundant of these solid phases. It can appear transparent or opaque bluish-white colour, depending on the presence of impurities or air inclusions. The addition of other materials such as soil may further alter the appearance.
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 can also deposit from vapour with no intervening liquid phase, such as in the formation of frost.
Ice appears in nature in forms as varied as snowflakes, hail, icicles, glaciers, pack ice, and entire polar ice caps. It is an important component of the global climate, and plays an important role of the water cycle. Furthermore, ice has numerous cultural applications, from ice cooling of drinks to winter sports and the art of (ice sculpting).
The word is derived from Old English ís, which in turn stems from Proto-Germanic *isaz.
This text uses material from Wikipedia, licensed under CC BY-SA