Science and technology

Associated Press
City workers at right map out the installation of fencing around earthquake damaged buildings Tuesday, Aug. 26, 2014, in Napa, Calif. The earthquake that jolted California's wine capital may have caused at least $1 billion in property damage, but it also added impetus to the state's effort to develop an early warning system that might offer a few precious seconds for residents to duck under desks, trains to slow down and utility lines to be powered down before the seismic waves reach them. The magnitude-6.0 quake struck early Sunday near the city of Napa. (AP Photo/Eric Risberg)

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