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A nine-year study tracked more than 800 of the massive and largely mysterious whale sharks. For the first time, researchers have tracked the sharks' far-flung migration and where they may go to give birth.

The White House announced Tuesday that President Obama will nominate Federal Reserve Vice Chairwoman Janet Yellen to chair the Federal Reserve Wednesday. She would replace Ben Bernanke, who's stepping down from the post. Yellen has been the presumptive nominee for weeks, after Lawrence Summers announced his intention to remove himself from the running in September. She'd be the first woman to head the Fed.

Three American professors won this year's Nobel Memorial Prize in Economic Sciences for their studies on asset prices.

It's been a tough week for the Tea Party and its supporters in Congress. But activist Sal Russo and others say that their movement isn't going away. They're looking ahead to next year's midterm elections, as well as to next month's local races.

Diplomats are again meeting to consider setting aside a protected zone in the pristine waters around Antarctica, though their previous negotiations ended in failure. A scaled-back plan on the table this week would still create the largest marine preserve in the world.

A new study finds that women who followed a Mediterranean style of eating in their 50s were about 40 percent more likely to reach the later decades without developing chronic diseases and memory or physical problems, compared to women who didn't eat as well.

Charlie Trotter was one of the country's most influential chefs. His death comes just a year after he closed his namesake restaurant in Chicago. Authorities plan to conduct an autopsy on Wednesday.

After his career at the racetrack ended, Metro Meteor was adopted by an artist in Pennsylvania, who discovered the horse's gift. Now, his paintings raise money to treat his knee problems and to help other retired thoroughbreds find new homes.

After a series of controversial decrees by President Mohammed Morsi, Egypt's judges are now preparing to strike. One young judge talks about how he sees the crisis.

Nelson Mandela had a bewildered look and was largely unresponsive when President Jacob Zuma stopped by earlier this week. After the visit was televised, some South Africans began criticizing the president, saying the images were disrespectful to the iconic figure.