Word: commonality
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Dates: during 1990-1999
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...those inclined to think of our fading century as an era of the common man, let it be noted that the inventor of one of the century's greatest machines was a man called Phil. Even more, he was actually born in a log cabin, rode to high school on horseback and, without benefit of a university degree (indeed, at age 14), conceived the idea of electronic television--the moment of inspiration coming, according to legend, while he was tilling a potato field back and forth with a horse-drawn harrow and realized that an electron beam could scan images...
Until this time, nearly all transistors had utilized germanium because it was easier to prepare in pure form. Silicon offered advantages, at least in theory, mainly because devices made from it could operate at higher temperatures. Also, silicon is a very common chemical element, whereas germanium is relatively rare. Silicon, however, melts at a much higher temperature, making its purification and processing more difficult...
...American pediatrician Benjamin Spock publishes The Common Sense Book of Baby and Child Care...
Human beings and the great apes had a common ancestor about 5 million years ago. The genes of the two groups differ hardly at all, but some of them are differently arranged. By using that information, along with hominid fossils, we shall learn what genetic changes made it possible for the ancestors of modern people to stand upright (about 4 million years ago) and then to speak. As a by-product, we shall be able to trace the migration routes of our human ancestors who emigrated from Africa and came to populate the surface of the earth. A half-century...
...Charles Dawson announces that he has found the fossilized remains of a human-like creature on Piltdown Common in Sussex, England. Christened Eoanthropus dawsoni, "Piltdown Man" will be exposed as a fraud...