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Jet lag and shift work impose painful changes on the body's circadian rhythms. Adjusting oxygen consumption might help, researchers say. But don't hold your breath; it's only been tested in mice.

As scientists try to figure out what happened to the Schiaparelli lander, which may have crash-landed, a craft known as the Trace Gas Orbiter is orbiting the red planet in search of signs of life.

Trump made headlines at the final debate when he refused to say he'd accept the results of the election. He says it would be unfair to ask him to accept the results of the November election now.

Federal prosecutors said in court documents that they plan to file Espionage Act charges against a former NSA contractor accused of stealing a huge trove of government secrets.

Donald Trump has alleged that the presidential election is rigged because, in part, the news media have "poisoned" the minds of voters. We take a closer look at the claim.

President Obama traveled to Florida Thursday to encourage more people to sign up for Obamacare when the enrollment window opens next month. The president's signature health care law has helped cut the uninsured rate to record lows. But it's showing some cracks, and many young people are reluctant to sign up.

The third presidential debate was Donald Trump's last big chance to turn around a race that seems to be slipping away from him. We watched the debate with Trump supporters in rural Western North Carolina to see whether they think he accomplished what needed to be done.

Hillary Clinton's strong position in the presidential contest is reassuring to many of her supporters. But if she's elected, many of them worry about if she'll encounter opposition — in Congress and out of the country.

They've been coming to the spacious cafeteria to hang out — and they bring their own food. No more, says Ikea.

She sells clothes from the back of her car. But business is dropping. Like many Zimbabweans, she faces a crippled economy, high unemployment and a shortage of cash.