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  • What is the Rare Earth Hypothesis? (with pictures)

    The Rare Earth hypothesis claims that the Earth is rare, and that few planets can support complex life. The Rare Earth hypothesis stands in contrast to the principle of mediocrity, which assumes that the Earth must be a typical planet, as there should be nothing special about humanity or the Earth.

  • What are 'rare earths' used for? - BBC News

    Mar 13, 2012· Rare earth elements are chemically similar and are sometimes used in similar ways. "Rare earths" are a group of 17 chemically similar elements crucial to

  • Rare earths, explained | The World from PRX

    Oct 20, 2010· Rare earths, explained. GlobalPost. October 20, 2010 · 9:08 AM UTC. Updated: ... the world had a geographically diversified supply of rare earth minerals. China produced a

  • The Rare Earth hypothesis Explaining Science

    Apr 08, 2018· The Rare Earth hypothesis. Ever since the pioneering work of Frank Drake (1930-) in 1960, astronomers have been looking for radio signals from extraterrestrial civilisations and have failed to find anything. This could be because Earth-like planets containing complex life forms (such as ourselves) are rare in the Universe and only a series of ...

  • US-China trade: what are rare-earth metals and what's the ...

    May 29, 2019· Rare-earth elements have helped make consumer electronics such as computers and smartphones lighter, smaller and more efficient. The consumer goods giant Apple, for example, is dependent on rare ...

  • Explained: What are Rare Earths, and why is US military ...

    Dec 12, 2019· Rare Earth Elements or Rare Earth Metals are a set of 17 chemical elements in the periodic table the 15 lanthanides, plus scandium and yttrium, which tend to occur in the same ore deposits as the lanthanides, and have similar chemical properties.

  • Don't Panic about Rare Earth Elements - Scientific American

    May 31, 2019· Dont Panic about Rare Earth Elements. The materials used in iPhones and Tesla cars need not become a long-term casualty of a U.S.-China trade war. A laborer works at the site of a rare earth ...

  • The Rare Earth hypothesis Explaining Science

    Apr 08, 2018· The Rare Earth hypothesis. Ever since the pioneering work of Frank Drake (1930-) in 1960, astronomers have been looking for radio signals from extraterrestrial civilisations and have failed to find anything. This could be because Earth-like planets containing complex life forms (such as ourselves) are rare in the Universe and only a series of ...

  • Rare earths in a nutshell: Physics Today: Vol 73, No 1

    Jan 01, 2020· The filling and spatial extent of the outer electron (5 d and 6 s) shells, which are most important in chemical bonding, are essentially unchanged across the entire rare-earth series.What varies from element to element is the number of electrons in the inner f shell. Because the atoms electronegativities are nearly identical, a compound that incorporates a given rare earth

  • Rare Earths Statistics and Information - USGS

    The principal economic sources of rare earths are the minerals bastnasite, monazite, and loparite and the lateritic ion-adsorption clays. The rare earths are a relatively abundant group of 17 elements composed of scandium, yttrium, and the lanthanides. The elements range in crustal abundance from cerium, the 25th most abundant element of the 78 common elements in the Earth's

  • The Rare Earth Hypothesis - Montana State University

    The Rare Earth hypothesis suggests that Earth-like planets containing complex (animal) life as we know it are likely quite rare in the Universe. ... Explain why L max1 is a limit on how bright a star can be and still have complex life on a nearby planet.

  • rare-earth element | Uses, Properties, & Facts | Britannica

    Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] through lutetium [Lu]).

  • What are rare earth elements, and why are they important ...

    The rare earth elements (REE) are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table plus scandium and yttrium. Rare earth elements are an essential part of many high-tech devices. The U.S. Geological Survey news release "Going Critical" explains:

  • REE - Rare Earth Elements - Metals, Minerals, Mining, Uses

    Rare Earth Element Production: This chart shows a history of rare earth element production, in metric tons of rare earth oxide equivalent, between 1950 and 2020. It clearly shows the United States' entry into the market in the mid-1960s when color television exploded demand.

  • Rare Earth Hypothesis: Meaning, Theory with a Simple ...

    Oct 05, 2020· The Rare Earth Hypothesis argues that the development of complex life on Earth, not to mention intelligence, was an incredibly improbable thing in terms of the geological and astronomical variables involved, suggesting that the galaxy is not filled

  • Rare earth elements: what confluence? | Sean Dudley ...

    May 24, 2016· Have you ever considered the amazing amount of mining, processes, and resources needed to make your cell phone? Do you know what rare earth elements are and ...

  • Rare earths in a nutshell: Physics Today: Vol 73, No 1

    Jan 01, 2020· As a class, the rare-earth elements comprise the 15 silvery-white metals, from lanthanum to lutetium, in the sixth row of the periodic table and the transition metals scandium and yttrium. Despite their name, most rare earths are not actually rare; nearly as many neodymium atoms reside in Earths crust as nickel atoms, for example.

  • Rare Earth Mining -

    VOA's Philip Alexiou talks with the President and CEO of Avalon Rare Metals who recently visited the New York Stock Exchange. Don Bubar who leads the Toron...

  • The Geology of Rare Earth Elements

    Rare Earth Ore Classification. Classification of ores related to alkaline rocks is also controversial. Table 2 presents a relatively simple classification that follows analogous categories for deposits related to nonalkaline igneous rocks. Some of the more unusual alkaline rocks that host, or are related to, REE ores are carbonatite and phoscorite, igneous rocks composed principally of ...

  • rare-earth element | Uses, Properties, & Facts | Britannica

    Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 ( scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table ( cerium [Ce] through lutetium [Lu]). The elements cerium through lutetium are called the lanthanides, but ...