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The former Pennsylvania senator, who won Iowa in 2012, hopes he can do it again. But with a more crowded field, he might find it difficult to stand out.

It seemed to make sense that the childhood Hib vaccine could cut leukemia risk by keeping the immune system in check. But proving there's cause and effect at work turns out to be a challenge.

The U.S. Court of Appeals for the 8th Circuit has blocked an Arkansas law that bans abortion after 12 weeks of pregnancy. The case was filed by two doctors on their own and their patients' behalf.

The former Republican senator from Pennsylvania appeals to his party's social conservatives. Rick Santorum won the Iowa caucuses in 2012, but this time around he faces a crowded Republican field.

The debate over whether digital books are better continues. Yet in the age of Amazon, the number of independent booksellers is up. The revival is fueled, at least in part, by digital natives.

African Americans are going to be key to a Hillary Clinton presidential run. After a tense 2008 primary fight with Barack Obama, she's trying to win them over.

Kids from across the country compete Thursday night in the finals of the Scripps National Spelling Bee. The film Spellbound captured the drama involving 8 kids who competed in the bee 16 years ago.

The Pentagon says an attempt to ship inactive anthrax samples resulted in live samples being sent to labs in nine U.S. states and to a U.S. Air Force base in South Korea.

The buggy mess reportedly broke one of the school's air conditioning units, and janitors from other schools had to come help clean up. It's fair to say the principal is seeing spots.

A woman ordered ice cream at a store in Michigan, and she had a fit when she wasn't given enough sprinkles. At a nearby hotel, two women fought over whose waffle was in the lobby waffle maker.