WASHINGTON/CAMBRIDGE, Mass. Scientists for the first time have detected gravitational waves, ripples in space and time hypothesized by Albert Einstein a century ago, in a landmark discovery announced on Thursday that opens a new window for studying the cosmos. | Video
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WASHINGTON The Federal Reserve's carefully scripted decision to raise interest rates last December, and begin a return to "normal" policy, may now become a nightmare for the U.S. central bank if an economic downturn forces a return to unconventional methods.
NEW YORK Global stock markets are on their shakiest footing in years.
WASHINGTON The U.S. Senate on Thursday passed legislation placing a permanent ban on states' taxing Internet access, sending the measure to President Barack Obama for signing into law.
SEOUL South Korea will begin talks with Washington as early as next week on deploying an advanced U.S. missile defense system following North Korea's rocket launch, an official said on Friday, as Seoul cut power to a factory park run jointly with the North.
WASHINGTON Federal Reserve Chair Janet Yellen returned to Congress on Thursday and again stressed that the U.S. central bank was not on a "pre-set" path to return policy to "normal" given a worsening meltdown in global stock markets.
The wife and mother of two men whose imprisonment in January precipitated a 41-day standoff at an Oregon wildlife refuge told Reuters on Thursday she hopes the peaceful outcome will spur further activism to curb the reach of the federal government.
BAMAKO Suspected Islamist militants attacked a U.N. base in the northern Mali town of Kidal with mortars and machine guns on Friday, killing three peacekeepers and wounding 30, United Nations and separatist sources said.