20th century trends

 in the early 20th century, technologies such as electricity, the incandescent light bulb, the automobile, and the phonograph, first developed at the end of the 19th century, were perfected and universally deployed. today, smartphones, bullet trains, and sports cars are the norm. this just goes to show how different times can foster different technologies. anthropology is definitely a type of research that could be applied in this situation because it would help give a better understanding of how those technologies affected the time periods and vice versa. when the transistor was invented on december 23, 1947, the world was changed- the three individuals credited with the invention of the transistor were william shockley, john bardeen, and walter brattain. It allowed the signal to be amplified regularly along the line, meaning that a telephone conversation could go on across any distance as long as there were amplifiers along the way. But the vacuum tubes that made that amplification possible were extremely unreliable, used too much power, and produced too much heat. at the time, it was one of the most revolutionary inventions, but nowadays, it would be considered outdated and old, and that just goes to show how different tools/technologies change throughout different times.