PHOTOS: Community mourns teacher killed by 14-year-old student
Students at Danvers High School in Massachusetts return to campus Thursday to mourn the loss of math teacher Colleen Ritzer, who police said was killed by 14-year-old student Philip Chism.
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How virus sleuths and public health officials track the cause of a mysterious illness
When a mysterious disease fells people - as happened in California recently, with as many as 20 children experiencing unexplained paralysis - teams of physicians and epidemiologists quickly mobilize. Perhaps you saw the movie "Contagion"? The idea is to find the culprit before it spreads but also to prevent public panic.
Holder: Heroin deaths an 'urgent and growing public health crisis'
Attorney General Eric Holder, calling the rise in deaths from overdoses of heroin and prescription painkillers an "urgent and growing public health crisis," is outlining a series of efforts by the Justice Department to combat the epidemic.
VIDEO: Chrysler orders community college to crush rare Dodge Viper
Students at a community college in Washington are fighting to save a rare Dodge Viper given to them by the Chrysler Corporation. The company now says it must be destroyed for legal reasons.
Staples to close 225 stores as online competition hurts sales
Staples Inc., the largest U.S. office-supplies chain, will close as many as 12 percent of its North American stores and cut as much as $500 million in costs as online competition continues to hurt sales.
Frigid U.S. weather means highest power prices since '08
Freezing temperatures gripping the eastern U.S. will result in the highest electricity prices in six years for consumers in Boston, Dallas and San Francisco.
Do flu shots cause runny noses?
The vaccine used in the study is similar to FluMist, of which 13 million doses were distributed in the United States this year. The work helps explain why runny noses were an occasional aftereffect of FluMist in clinical trials.
Polar vortex may prove to be a powerful pesticide
The deep freeze, with arctic blasts from the polar vortex, has put invasive insects on ice in dozens of states. That includes the emerald ash borer, a pretty bug that does ugly things to ecosystems it invades.
Five things you should know about the Netflix-Comcast deal
Now Comcast and Netflix have announced that they will directly interconnect their networks, rather than having Netflix traffic flow first through a third-party network. With this, another layer of Internet architecture - interconnection and peering - is under the microscope.
VIDEO: NASA discovers 'mother lode' of alien planets
NASA is announcing that by using the Kepler Space Telescope scientists have almost doubled the number of known exoplanets, including four in the habitable zone, which means the planets have mild enough temperatures to support life.
Data breach hits Target's profits, but that's only the tip of the iceberg
In its first financial release since the December breach that enabled the theft of millions of customers' payment data, Target said profits fell 46 percent and that the breach had already cost the retailer $17 million. The final tally will be bigger, the company said, but it's unclear by how much.
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