Word: earthly
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Dates: during 1950-1959
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...worldwide alarm over Soviet long-range missiles, scant attention was paid to the U.S. Army's warning that Russia has made startling progress in the development and production of conventional weapons. Last week, with its Explorer triumphantly orbiting, the Army found a readier audience for its down-to-earth worries. The Army's argument: if it is to meet the Soviet challenge on the ground, it needs more and newer hardware...
Like scaled stones skittering atop a lake, radio and TV signals ricochet from the electrically charged ionosphere. Some fall to earth in unpredictable patterns that baffle scientists. Because of the ionosphere's quirks, the man with the world's widest range of TV viewing may well be an English electronics engineer named George F. Cole. His address: Salisbury, Southern Rhodesia, thousands of miles from Europe's transmitters...
...hundred million years ago the monstrous dinosaur was the king of beasts. Then the dinosaurs suddenly died off, leaving dominance of the earth to smaller, warm-blooded mammals. One theory is that the great die-off was caused by a sudden change of climate. Another is that the slow-witted, blundering dinosaurs could not cope with mammals that destroyed their eggs. Biochemist Albert Schatz of National Agricultural College, Doylestown, Pa. has a third theory: that the evolution of modern plants was the death of the dinosaurs...
According to Dr. Schatz, the dinosaurs were sluggish beasts whose metabolism (vital chemical processes) was so slow that they could keep their vast bodies alive without a great deal of food. In their age, he thinks, the earth's atmosphere did not contain so much oxygen as it does today. The dominant plants were mostly gymnosperms (conifers, ginkgoes, etc.) that did not excrete so much oxygen as modern plants...
...dinosaurs. They were compelled to live at a faster rate, and they could not gather the vast amounts of food their speeded-up bodies called for. So they burned out and died out, while the newly evolved mammals, well-adapted to oxygen-rich air, took over the earth...