Word: decays
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Dates: during 1990-1999
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When massive stars explode as supernovas, for example, they create a periodic table's worth of radioactive elements, some of which decay into antielectrons, known as positrons. A black hole, scientists believe, can also produce electron-positron pairs by superheating the material that spirals into its gravitational sinkhole. It was the radiation produced by annihilating positrons and electrons, not the antimatter itself, that was actually observed by Purcell at Northwestern and his collaborators at the Naval Research Laboratory in Washington...
Harvard plans to renovate Widener Library and install a $28-million climate control system to curb the decay...
...library's money problems are exacerbated by what is known in preservation circles as the "acid paper problem," which has caused a sizable portion of Harvard's collection to turn brittle from decay...
...dying to hear Zimmer's thoughts on the game's decay, what it means to be a bench coach, and why 46 years ago he married his high school sweetheart on a baseball diamond of all places...
...spacecraft is imminently expected. It will carry believers to an enigmatic "garden" where they will get "energy" from their coequal, the King of Kings, alias Chief of Chiefs, the god who created Planet Earth. Believers will live eternally in hairless, toothless bodies that are free of disease and decay...