Word: spaces
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Dates: during 1950-1959
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...Latin American air transportation problems, was a close associate of Presidential Assistant Nelson Rockefeller. As Special Assistant for Research and Development to the Secretary of the Air Force (1950-52), Burden laid the groundwork for his appointment by President Eisenhower last May to the blue-ribbon National Aeronautics and Space Council...
...that the early earth may have lacked the dense central core that it has today. Its hot, fluid inside material could circulate unhampered in a single "cell," rising to the surface on one side of the sphere and sinking down on the opposite side after cooling by radiation into space and getting heavier. When this had gone on long enough, all the light rock on the earth's surface was gathered in one hemisphere as a single "ur-continent...
...matter whose distinctive characteristic is that its particles are electrically charged. Scientists call it "the fourth state of matter,'' because plasma follows its own peculiar laws, responding to electrical forces and creating them. The sun and stars are mostly plasma; so are many loose particles moving in space between them. In fact, cosmologically speaking, only in a few exceptional places does matter settle down and become electrically neutral. But since the human race lives in one of those places-the cool outside of the planet Earth-its scientists came to think of neutral matter as the normal kind...
...begins to reach out beyond his own planet into outer space, scientists are being forced to grapple with the fact that they live in a plasma universe. Said M.I.T. Physicist William P. Allis: "It is as if a people had lived all their lives in the mountains and then had come down to the edge of the ocean. Before they could use sea water or navigate through it, they would have to learn some things that would be perfectly obvious to anyone who had lived by the sea." Last week the National Science Foundation announced grants...
Neither university will build big apparatus. None is necessary; space-age man encounters many natural plasmas and creates many new ones. Fluorescent lamps are full of glowing plasma. The newly discovered Van Allen radiation belt, which surrounds the earth and stands as a threat to space-voyaging man. is a thin but dangerous plasma. The fireballs of nuclear explosions are made of plasma; so are electric arcs. When the warhead of a missile slams back into the atmosphere, it heats the air around it to 18.000° and turns it into an electrically charged plasma...