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Tuberculosis is one of the oldest diseases in human history. Signs of the bacteria have even been seen in Egyptian mummies. Now scientists find evidence that TB is much more ancient than we thought. The bacteria may have started infecting people more than 70,000 years ago, long before farming began.

Ai Weiwei, the world-renowned Chinese artist and dissident, has created a deeply autobiographical work for the Venice Biennale exhibit. It is a series of dioramas about his life as a political prisoner, when he was jailed for criticizing the corruption and shoddy construction that caused the deaths of 5,000 children when schools collapsed in the 2008 Sichuan earthquake.

A Mexican national was executed by the state of Texas on Wednesday night for killing a Houston police officer. He was put to death by lethal injection shortly after the U.S. Supreme Court rejected his appeal, and despite calls from Secretary of State John Kerry to delay the punishment.

Insurance enrollment will be a key yardstick for assessing whether the Affordable Care Act is working. Almost as important as the total number of people who get coverage is whether a significant percentage of them are healthy.

The Volcker rule, a key part of the 2010 Dodd-Frank financial law, prevents banks from using government-insured money to make speculative bets.

The United Nations says 22 children were killed in an airstrike and puts the blame on the Saudi-led forces intervening in the civil war.

The U.S. squad, 242 strong, has more women than ever. It also includes 10 African-Americans, 11 Asian-Americans and the first two openly gay athletes to compete for the U.S. at a Winter Olympics.

On Saturday, supporters chanted "Resist!" as they surrounded a union headquarters where Lula holed up in his last hours of freedom. He's been sentenced to 12 years in prison over corruption charges.

The platform will take tens of millions of locked accounts off follower lists in an attempt to crack down on fraud.

While the storm had moved offshore Saturday, flood threats remained, especially along coastal Massachusetts, where crews have rescued scores of people. The governor has declared a state of emergency.