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At the end of its first day of public trading, shares of Twitter were valued at $44.90, reflecting a market value of more than $31 billion. The social media company sold 70 million shares of stock, raising $1.82 billion in the process.

Boston's David Ortiz is flirting with a World Series record. He's got 11 hits in 15 at-bats. That .733 batting average eclipses the rest of his team's. Boston players not named Ortiz are hitting .144. The Sox could wrap up the championship Wednesday. St. Louis hopes to extend the Series to a Game 7.

Alright, if you insist. Here are the answers to Ask Me Another's NPR quizs.

At a Democratic fundraiser in Washington, D.C., a woman interrupted Michelle Obama with shouts about rights for gays. "Listen to me or you can take the mic, but [then] I'm leaving," the first lady said after confronting the woman. "You all decide. You have one choice." The heckler was escorted away.

The first comprehensive global study to be conducted finds that domestic violence kills many women and leaves others with long-standing physical and mental health problems, including sexually transmitted diseases and depression.

University of New Hampshire professor Yitang Zhang announced this week that he has come close to solving a centuries-old problem: proving the twin prime conjecture. Host Scott Simon gets an explanation from Weekend Edition Math Guy Keith Devlin of Stanford University.

Preliminary data show an increase in highway deaths among 16- and 17-year-olds last year. In response, the government is preaching a message of "don't text and drive" and has urged students to produce their own public service ads. Officials say parental involvement may be even more important.

Pakistanis voted in parliamentary elections Saturday after a violent campaign season that left dozens dead. NPR's Julie McCarthy is in Lahore and tells Weekends on All Things Considered guest host Arun Rath the latest.

Many young children get surgery for ear tubes to prevent infections, but it can be hard to figure out which children will benefit. The first guidelines on when children need tubes could help reduce the confusion.

A new study shows women are dying from overdoses of prescription painkillers at a much higher rate than ever before. Men still suffer more overdoses but women are catching up, fast. Since 2007, more women have died from drug overdoses than from motor vehicle crashes.