Word: unknown
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Dates: during 1940-1949
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...several weeks of indecision a track meet with Fort Devens which has been on the fire for some time has finally been scheduled for today at 4 o'clock. This will be the first meet outside of College walls for the Mikkolamen, and a test against a team of unknown strength, with the outcome any man's guess...
...Rheumatoid arthritis, which usually affects people between the ages of 20 and 40. The cause is still unknown. Some of its symptoms (e.g., slight fever) suggest it may be infectious though no microorganism has so far been incriminated. Another possible cause: metabolic disorders...
...arrival of U.S. troops and base-building dollars brought an inflationary spiral and a minor social revolution. In Jamaica, where Jim Crow was unknown before, some soldiers and civilian base workers tried to order "niggers" out of clubs and bars they had been frequenting for years. Others, failing to recognize the Caribbean caste system, which separates mulattoes from blacks and then grades the mulattoes socially according to the shades of their skins, fraternized with "the wrong people." At the same time the U.S. "invasion" raised hopes that a new deal in West Indian political and economic life would spring from...
...their foundations in the area where he now waits to strike: in North China, Manchuria and the near borders of Russia's Siberia (see map). There were bred Japanese hates, fears and hopes which only war could release. There too, in a vast segment of the earth almost unknown to the U.S. people, swirled forces which deeply involved the U.S. and, at least in Japanese minds, committed the U.S. to a final war for Asia...
...major mystery is how the animals maintain their fixed cycles in spite of all such interference. Zoologist Elton concludes that the master factor is still unknown. He believes it may prove to be of a hitherto-undetected meteorological nature, hints at possible interstellar influences...