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Florida's Republican primary is Tuesday. If Mitt Romney wins, it's a potentially decisive state for the former Massachusetts governor's bid for the nomination. But a victory by Newt Gingrich would all but guarantee a long battle ahead. NPR's Don Gonyea reports on the mounting attacks.

Ai Weiwei, the world-renowned Chinese artist and dissident, has created a deeply autobiographical work for the Venice Biennale exhibit. It is a series of dioramas about his life as a political prisoner, when he was jailed for criticizing the corruption and shoddy construction that caused the deaths of 5,000 children when schools collapsed in the 2008 Sichuan earthquake.

Tuberculosis is one of the oldest diseases in human history. Signs of the bacteria have even been seen in Egyptian mummies. Now scientists find evidence that TB is much more ancient than we thought. The bacteria may have started infecting people more than 70,000 years ago, long before farming began.

For starters: Your voice is too squeaky, too loud; it lacks authority, is grating or obnoxious or unprofessional. Why is talking while female such an offense?

Those who use two of the world's most popular websites can easily donate to charities working to stem Ebola's spread in West Africa. The money will help, but aid groups say awareness is important too.

Robert Siegel talks to Maureen Sullivan, senior vice president of strategic services and chief strategy officer for Blue Cross Blue Shield Association, which did the study.

Two rock climbers are close to finishing a hugely ambitious project on El Capitan in the Yosemite Valley — free-climbing the Dawn Wall. They talked to NPR's Melissa Block from the rock face.

The Sunni town fought back when Sunni Muslim extremists from the Islamic State tried to impose their rule. The extremists leveled the town as a warning to Sunnis who won't accept their brutal rule.

Voter turnout was up among college students by more than the nation as a whole in the last election, a Tufts University report says. But that turnout varied greatly across different types of colleges.

Several states plan to move quickly to make sports betting legal in the wake of Monday's decision. But they will be competing with an established black market that lacks tax forms.