Word: layered
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Dates: during 1960-1969
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Metallurgists have long known why metals do not bond themselves together when they come in contact in the earth's atmosphere. Exposed to air, they have already become covered with oxide films or a thin layer of gas that keeps the metals from actually touching. National Research scientists were interested in what happens when metals touch in the hard vacuum high above the earth's atmosphere. In their space simulation chamber they created an almost perfect vacuum (10 torr-), the same as spacecraft encounter 500 miles above the earth. In that ultra emptiness, surface gases evaporated; oxide films...
Bronze Tuberculosis. Hospitalized in the laboratory of the National Museum in Athens, the kouros was tenderly nursed back to bronze health. Ancient Greek sculptors used the "lost wax" process, making their original models of wax-covered clay. When the final details had been modeled in the wax, a second layer of clay was molded around it. Molten bronze poured between the two clay surfaces melted the wax and replaced it, forming a hollow statue of bronze filled with irremovable clay...
...issue was the President's proposal to create a new, Cabinet-level Department of Urban Affairs, with Federal Housing Administrator Robert C. Weaver, a Negro, at its head. Republican Senators and Congressmen opposed the idea of the department on grounds that it would merely add another cumbersome, costly layer to the federal bureaucracy. Southern Democrats inevitably were hostile to Weaver's appointment...
...star that has burned so thoroughly that it now consists chiefly of "degenerate" matter, denser than anything known on earth. This remarkable stuff weighs thousands of pounds per cubic inch. The nova's degenerate core is extremely hot, but its surface is covered with a thin, rather cool layer of normal matter. The other star of each pair is all normal matter, mostly hydrogen, and just about the same weight and size as the sun. In many cases, Dr. Kraft is sure the two stars are almost in contact, the white dwarf dancing just above the surface...
...larger star whirls through its tight orbit, it spins hydrogen off its surface. Some of this gas is attracted by the white dwarf's intense gravitation. When the layer thickens, some of the hydrogen is forced down into contact with the star's degenerate core, which is as hot as the heart of an exploding H-bomb. Suddenly a nuclear reaction races through the hydrogen, turning it into helium and releasing a vast amount of energy. The little dwarf star flares up. many times brighter than its great partner. Once the crisis is over the stars waltz peacefully...