Problems plague new air traffic control computers

(AP) -- New computers crucial to modernizing the U.S. air traffic control system have run into serious problems and may not be fully operational by the end of this year when the current system is supposed to be replaced, ...

Big study of dirty air inversions

At times this winter, the greater Salt Lake City area has harbored the most polluted air in the United States. Now, researchers from the University of Utah and other institutions are starting a three-year, $1.3 million study ...

Scientists offer new theory for largest known mass extinction

The largest mass extinction in the history of the earth could have been triggered off by giant salt lakes, whose emissions of halogenated gases changed the atmospheric composition so dramatically that vegetation was irretrievably ...

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