Word: earthly
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Dates: during 1950-1959
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...tektites be meteorites that moved on orbits in the solar system, says Kohman. The fragments of single stony meteorites could not cover large areas of the earth's surface, such as the tektite patches splattered over big parts of Texas, Libya and Australia. And it is easy to show, he says, that if they belonged to a loose swarm of small objects in the solar system (e.g., disrupted comets), the gravitational pulls of the sun and its planets would have spread them wider than the diameter of the earth. So they could not fall in any kind of patch...
...together in a tight cluster, like a bagful of marbles. As the cluster shoots into the solar system, it will, under the Kohman hypothesis, feel various gravitational pulls and will start to open, but its particles will not have time to scatter very widely before they hit the earth...
...check this theory, Dr. Kohman suggests, is more thorough analysis of tektites. Tektites that came from a stellar system much younger than the solar system should, for example, contain traces of short-lived elements (e.g., plutonium 244 and curium 247) that have long been extinct on earth...
Anyone watching a geyser, hot spring or fumarole (volcanic steam jet) in the U.S. West may well wonder why the earth's hot interior is not used as a source of energy, in the manner of volcanic steam power plants in central Italy. Last week Pacific Gas & Electric Co. of California announced that it has struck a deal to make electricity out of underground steam produced jointly by Magma Power Co. of Los Angeles and Thermal Power Co. of San Francisco...
...site of the earth-power plant will be a hot spot near Healdsburg, 60 miles north of San Francisco, where hot springs and fumaroles abound. President Barkman C. McCabe of Magma Power thinks that a crack in the earth's crust allowed magma from the earth's hot interior to rise fairly near the surface. Magma is uneasy stuff, an intensely hot solution of steam and other gases in melted rock. When it bursts out in large quantities, it builds a volcano. When it does not quite break loose, it creates a geothermal area like the place near...