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Passionate advocates believe that squatting over the toilet is a more healthful position than sitting down on one. They say the posture can alleviate problems like hemorrhoids. One company is making stools to help people get closer to the squat.

Disgraced senior Chinese politician Bo Xilai has been expelled from the Communist party, and will now face criminal charges. The Xinhua news agency says he's accused of abusing power, taking bribes and having improper sexual relations with women. It also implicates him in the murder case involving his wife, saying he made serious mistakes for which he will have to take responsibility.

How much of the recent hot weather can be attributed to global warming? Scientists will no doubt dig into the data and grapple with that question in the months to come. They have already taken a stab at that question regarding some of last year's extreme weather events, like the drought in Texas.

Robert Siegel talks to Miriam Elder of The Guardian about floods in Russia that local officials say have killed more than 170 people.

When it comes to the search for life beyond Earth, most of the focus is in on Mars. But a growing number of scientists are looking at Saturn's moon, Enceladus, instead. Scientists believe the moon has water and organic materials that are the building blocks of life.

Republicans slated to speak at the convention in Tampa include 2008 nominee John McCain and Condoleezza Rice, the Bush administration secretary of state and national security adviser. The list also includes two up-and-comers who highlight diversity in the GOP governors' ranks.

A deadly assault on an Egyptian border post is proving to be the biggest challenge to face Egypt's new leader so far. Mohammed Morsi is now struggling to assure an exhausted nation that he can provide security as well as basic services. But he needs the support of the military, his biggest rival.

Allyson Felix and Jeneba Tarmoh were scheduled to race later today. But NBC Sports and the AP say Tarmoh has declined.

Our Best YA Fiction poll is live — but where are classics like A Wrinkle in Time and Are You There God? It's Me, Margaret? Surprisingly, our expert judges cut these titles — and many others — for skewing too young.

The Bourne Legacy, the fourth film in the action franchise, connects back to previous installments but introduces a new hero, Aaron Cross (Jeremy Renner). Critic Mark Jenkins says surface changes don't alter the consistency between the films when it comes to style and plotting.