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The Mersenne prime was discovered by a computer in Ocala, Fla., on Dec. 7. Mathematicians have spent the past two weeks verifying the calculations.

Gunmen fatally shot the mayor of a town in Oaxaca state as he walked to city hall. It was the latest in a year of killings of public officials.

They’ve probably had a larger impact on your life than you think, even if you’ve never heard of them.

Threats to journalists abroad have increased. Is the U.S. doing enough to keep its citizens safe?

Cleveland's NASA Glenn Research Center would get $882 million under a budget proposal announced by the Trump administration Monday afternoon. Local researchers are gearing up for a return to the moon. The last time astronauts set foot on the lunar surface was in 1972. The new budget puts an emphasis on returning within the next five years on a more permanent basis.

Linus Vlatkovich, longtime "Prop God" of the Guthrie Theater in Minneapolis, has retired.

After Janus vs. AFSCME, what proposals involve collective bargaining on the state level?

It was a violent weekend in El Paso, Dayton and Chicago.

Investors paused to catch their breath Thursday after the stock market suffered its worst drop of the year the day before. Consumer spending is still strong, despite signs of a looming recession.

The meatpacking, farming, construction and manufacturing industries all rely heavily on an immigrant workforce. Many of those workers are undocumented.