Word: decays
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Dates: during 1990-1999
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...radio and television, transistors, computers and lasers. Physical knowledge increased so rapidly after 1900 that theory and experiment soon divided into separate specialties. Enrico Fermi, a supremely self-assured Italian American born in Rome in 1901, was the last great physicist to bridge the gap. His theory of beta decay introduced the last of the four basic forces known in nature (gravity, electromagnetism and, operating within the nucleus of the atom, the strong force and Fermi's "weak force"). He also co-invented and designed the first man-made nuclear reactor, starting it up in a historic secret experiment...
...said the advanced decay of the pipes would likely make it necessary to completely tear up the street in order to fix the problem...
...original notion that light was good for books has since been proved wrong--it hastens their decay...
This problem--book decay due to heat, humidity and sunlight in Widener's non-climate-controlled stacks--will soon be tackled as Harvard's largest library receives its most significant renovation ever...
Faculty say the massive size of this project is justified by the potential consequences should the books continue to decay...