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Studies show the caffeine in just a few cups of coffee enhances performance in a wide range of sports. But more isn't better, and concentrated caffeine can be lethal.

Payrolls have grown by more than 200,000 for six months in a row — the longest stretch since 1997. But 7.5 million people are working less than 40 hours per week even though they want full-time jobs.

If all goes according to plan, patients with Ebola virus will soon enter the United States. How does a hospital care for critically ill patients while protecting other patients, staff and the public?

Citing 6 months of strong job gains, President Obama says America's recovery from a debilitating recession is well underway. But he says the economy "could be doing even better" if Congress helped.

A Florida judge has ordered the state legislature to come back from recess for a special session. Lawmakers will be expected to draw up new maps for congressional districts found unconstitutional.

Fighting in Gaza took an ominous turn Friday, as a 72-hour humanitarian cease-fire fell apart and the Israeli military announced its belief that one of its soldiers was captured by Hamas militants.

The nation's political campaigns are in full swing, and evangelical Christians play an increasingly large role. Some Brazilians worry that U.S.-style battles over social issues may be on the way.

They Want My Soul is another fine Spoon album in a career that has now come to display a remarkable consistency

The voice-activated recordings that Nixon had made between February 1971 and January 1973 are transcribed in "The Nixon Tapes."

A man fishing in northern Russia was attacked by a bear. But the bear fled when the men's cellphone rang. The ringtone was Bieber's song "Baby."