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Cosa (chi) è rare earth - definizione
WIKIMEDIA DISAMBIGUATION PAGE
Rare Earth; Rare earth (disambiguation)
rare earth
(also rare-earth element or metal)
¦ noun Chemistry any of a group of chemically similar metallic elements comprising the lanthanide series and (usually) scandium and yttrium.
Rare-earth magnet
![[[Ferrofluid]] on glass, with a rare-earth magnet underneath](https://commons.wikimedia.org/wiki/Special:FilePath/Ferrofluid Magnet under glass edit.jpg?width=200 "[[Ferrofluid]] on glass, with a rare-earth magnet underneath")
PERMANENT MAGNETS MADE FROM ALLOYS OF RARE EARTH ELEMENTS
Rare earth magnet; Rare Earth magnet; Rare-Earth magnet; Rare earth permanent magnet; Rare-Earth Magnet; Rare-earth magnets; Rare-earth permanent magnet
Rare-earth magnets are strong permanent magnets made from alloys of rare-earth elements. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.
Rare Earth hypothesis
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![Complex life may exist in environments similar to [[black smoker]]s on Earth.](https://commons.wikimedia.org/wiki/Special:FilePath/Blacksmoker in Atlantic Ocean.jpg?width=200 "Complex life may exist in environments similar to [[black smoker]]s on Earth.")
![The [[Great American Interchange]] on Earth, approximately 3.5 to 3 Ma, an example of species competition, resulting from continental plate interaction](https://commons.wikimedia.org/wiki/Special:FilePath/Great American Biotic Interchange examples.svg?width=200 "The [[Great American Interchange]] on Earth, approximately 3.5 to 3 Ma, an example of species competition, resulting from continental plate interaction")
![An artist's rendering of the structure of Earth's magnetic field-magnetosphere that protects Earth's life from [[solar radiation]]. 1) Bow shock. 2) Magnetosheath. 3) Magnetopause. 4) Magnetosphere. 5) Northern tail lobe. 6) Southern tail lobe. 7) Plasmasphere.](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetosphere Levels.svg?width=200 "An artist's rendering of the structure of Earth's magnetic field-magnetosphere that protects Earth's life from [[solar radiation]]. 1) Bow shock. 2) Magnetosheath. 3) Magnetopause. 4) Magnetosphere. 5) Northern tail lobe. 6) Southern tail lobe. 7) Plasmasphere.")
![According to Rare Earth, the Cambrian explosion that saw extreme diversification of [[chordata]] from simple forms like Pikaia (pictured) was an improbable event.](https://commons.wikimedia.org/wiki/Special:FilePath/Pikaia gracilens B.jpg?width=200 "According to Rare Earth, the Cambrian explosion that saw extreme diversification of [[chordata]] from simple forms like Pikaia (pictured) was an improbable event.")
![Animals in the genus ''[[Spinoloricus]]'' are thought to defy the paradigm that all animal life on earth needs oxygen.](https://commons.wikimedia.org/wiki/Special:FilePath/Spinoloricus.png?width=200 "Animals in the genus ''[[Spinoloricus]]'' are thought to defy the paradigm that all animal life on earth needs oxygen.")
![human writing]] exists for only 0.000218% of Earth's history.](https://commons.wikimedia.org/wiki/Special:FilePath/Timeline evolution of life.svg?width=200 "human writing]] exists for only 0.000218% of Earth's history.")
HYPOTHESIS THAT COMPLEX EXTRATERRESTRIAL LIFE IS A VERY IMPROBABLE PHENOMENON AND LIKELY TO BE EXTREMELY RARE
Rare earth hypothesis; Rare Earth Hypothesis; Rare Earth theory; REh
In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances.
Wikipedia
Rare earth
Rare earth may refer to:
- Rare-earth elements, a group of elements on the periodic table
- Rare-earth mineral, a mineral substantively composed of these elements
- Rare-earth magnet, a type of magnet that employs rare earth elements to increase effectiveness
- Rare Earth hypothesis, the theory that complex life in the universe is exceptionally rare
- as a proper noun:
- Rare Earth: Why Complex Life Is Uncommon in the Universe, a book by Peter Ward and Donald E. Brownlee
- Rare Earth (band), an American musical group
- Rare Earth Records, a subsidiary of Motown Records which produced rock music
Esempi dal corpus di testo per rare earth
1. And voluntary safety standards would become mandatory, including a requirement that powerful rare earth magnets in toys not fall out or come loose.
2. In particular, the Kumdang–2 injection, insam (ginseng) polysaccharide highly activated by rare earth elements, has become famous as a strong immune control and reanimation substance.
3. Unocal‘s possession of certain technologies and materials such as rare earth minerals with dual use potential introduces additional security considerations, the USCC commissioner said.
4. Unocal also has a pipeline hooked up to American strategic oil reserves, as well as a rare–earth mine, the only one in the United States.
5. It has effectiveness in surveying precious placer mineral resources of alluvial gold, diamond and olivine, placer mineral resources such as magnetite, ilmenite, zirconium and tin–wolfram and rare earth mineral resources such as tantalum, niobium and monazite.