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People with poor oral health are more likely to have an oral infection with human papillomavirus. Even after the researchers factored in risks from smoking and oral sex, poor oral hygiene appeared to be an important factor.

Today's undocumented activists are using strategies borrowed from the civil rights movement and calling their struggle "The Civil Rights Movement of the 21st Century."

An experimental drug rescued three out of seven monkeys from lethal doses of Ebola. The study marks the first time researchers have shown that a drug can successfully treat Ebola in animals even after the infection is well underway.

Just in time for college students returning to their dorms: an eco-friendly showerhead that reminds users they're wasting water by lingering.

The windswept island about 6 miles off the coast was a haven for a hugely diverse bird population until fishermen decimated the birds' ranks. Puffins have been successfully reintroduced to Eastern Egg Rock, but warming ocean waters may be threatening their ability to survive.

The government culled thousands of emails between Americans and misrepresented its surveillance efforts at least three times in three years, a 2011 FISA court opinion says.

The president will spend the next two days on a bus tour of New York and Pennsylvania that includes stops at three colleges and a high school. At each stop, he'll be talking about ways to keep higher education costs down.

Beta agonists, a class of drugs widely fed to cattle and hogs to make them put on weight faster, are coming under increasing scrutiny. Reports suggest animals fed these drugs can seem reluctant to move — lethargic, unable to walk properly — and may die more often, too.

A veterans group handed the White House a petition to take action on the "million veteran backlog" on Tuesday. But the Veterans Administration says that backlogged claims are dropping for the fifth month in a row and are now under half a million.

A new poll in the Virginia governor's race reports Democrat Terry McAuliffe has a sizable lead over Republican Ken Cuccinelli among female voters. That's a departure from the 2009 contest, when the Republican nominee won the women's vote by a healthy margin.