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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.

Reports over the weekend said the U.S. and Iran had agreed to face-to-face negotiations, but both countries deny that's the case. Still, symptoms of economic and social instability may be pushing Iran toward the negotiating table.

A dozen teachers, all of them Democrats, are running for seats in Ohio's House and Senate. The surge is a byproduct of last year's voter referendum repealing a state law that would have curbed public employees' collective bargaining rights. Another byproduct is reusing teacher phone banks from that effort to support President Obama.

Five days after Superstorm Sandy, crews in New Jersey are still working 14-hour days to restore power. Part of the job is cleaning each individual wire, and part is explaining what took so long to get the lights back on.

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 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.

At stake is control of the Washington state Senate, where the GOP holds a one-seat majority. It's currently the only Republican-held legislative chamber on the West Coast.

The credit reporting agency said Chairman and CEO Richard Smith is retiring — just weeks after Equifax acknowledged that hackers had accessed the personal information of up to 143 million consumers.

As recovery efforts continue, scientists are studying how much climate change had to do with Harvey's record-setting rainfall and unusual path over Texas.

How can a child's birth order and environment shape him or her as an adult? The Atlantic's Derek Thompson joins us to take a closer look.