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Tulsa, Okla., has been the focus of much debate over the long-term benefits of preschool. The most recent findings by Georgetown University researchers are another strong endorsement for early ed.

Just as natural antibodies help your body find and fight microbial invaders, tailored research antibodies let scientists target and study cancer cells. But too many are poorly made, scientists say.

California's punishing drought had a major role in raising the nation's average temperature to a near-record level last year.

U.S. schools are scrambling to teach millions of students who don't speak English. That means more program options and better services. Here's a look at the three most common approaches.

A man's testosterone level drops as he ages, but boosting it with supplements has been controversial. The first year of data from a big study now suggests a modest boost in libido for some men.

If it were a phone call, we might call it a butt-dial: A strong radio signal that set off speculation about possible alien origins is now believed to have come from a terrestrial source.

Fifty years after the death of Martin Luther King Jr., his hometown still has major racial disparities in mortality and other measures of health.

An Amnesty International report depicts the terrors faced by the Syrian civilians trapped by ISIS fighters. Among those terrors: errant airstrikes by the U.S.-led coalition pushing to liberate them.

Donald Trump has promised to deliver a speech this week that will address Bill and Hillary Clinton's scandals. Here's a breakdown of those scandals and their outcomes.

It was a slobberknocker all game long, with both offenses dominating. But ultimately, Philadelphia's defense made the crucial final stops that earned the team its first-ever Super Bowl title.