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How many countries are in Africa? 1, 15, 54 or 122? Take our beginner's quiz and test your knowledge of the second-largest continent in the world.

There's a controversy in the world of curling. New broom technology is changing the way the game is played — making it too easy, players like Brad Gushue say. So, researchers tried to find a solution.

The prime minister of India visits the U.S. this week and will meet with President Obama and address Congress. Modi was once banned from entering the U.S., but opinions in Washington have changed.

A gold and crystal dagger that's in Tut's crypt has been found to have a blade composed of iron, nickel and cobalt. A material so valued, that at the time it was dubbed "iron from the sky."

He was a great athlete and humanitarian. He was also a symbol of defiance for black men around the world.

Rudin, who started in theater at age 15, owes a lot to the producers who taught him his craft. "They were giants," he says. All five of Rudin's current shows have been nominated for Tony Awards.

Economic studies suggest that when people feel economic pain, they punish the sitting president's party.

The death penalty will be official if upheld by a judge at a sentencing hearing. Sixty-three-year-old Lonnie David Franklin Jr. was convicted in the murders of nine women and a teenage girl.

Philanthropist and art collector Paul Mellon gave the gift of art to the American people. The National Gallery of Art in Washington is honoring that gift as part of its 75th anniversary celebration.

At the end of a two-day meeting, U.S. and Chinese officials agreed to work on reducing the world's steel glut. But U.S. companies and workers said they were skeptical that China will really act.