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When NPR, the Robert Wood Johnson Foundation and the Harvard School of Public Health asked parents and caregivers in our new poll whether getting a good night's sleep is important, families overwhelmingly told us that sleep is a high priority.

But almost all said that it's difficult to pull off. And studies suggest this is especially true for teenagers.

When Linda Hernandez was growing up in Lincoln, Neb., in the 1960s, her family was one of the few Latino families in town. And that sometimes made school life difficult, she says.

"We had to sit in the back of the class and stay after school and clean the erasers when the other kids didn't have to do that," says Linda, now 60. "But both my parents laid down the law and said, 'You had to go to school.' "

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AUDIE CORNISH, HOST:

From NPR News, this is ALL THINGS CONSIDERED. I'm Audie Cornish. This evening, the Obama administration filed a friend of the court brief urging the U.S. Supreme Court to strike down California's ban on gay marriage, but the brief does not call for abolition of bans on same-sex marriage across the country. NPR legal affairs correspondent Nina Totenberg joins us in the studio. And, Nina, just to start, remind us quickly how this case actually came to be.

Hear Laura Sydell's report for Morning Edition by clicking the audio link.

Groupon co-founder Andrew Mason has been fired as the daily-deal company's CEO, one day after Groupon posted financial results that showed it lost $67.4 million during 2012. Board chairmen Eric Lefkofsky and Ted Leonsis will jointly fill the CEO post on an interim basis.

When singer Thom Yorke stepped away from his influential rock band Radiohead in 2006 to release The Eraser, many thought the quirky electronic project was a one-off. Not so, it turns out. Yorke and producer Nigel Godrich called on rock-star friends for a tour, and since then, the group has convened occasionally in the studio.

There are few things in life more joyful than discovering a giant oil or natural gas field in Texas. You're suddenly rich beyond your wildest dreams. When the scope and size of the natural gas reservoir in the Barnett Shale in North Texas first became apparent, there were predictions that the find would last 100 years.

Well, that was over the top. But University of Texas geology professor Scott Tinker, who designed and authored a new study of the Barnett Shale, says there's still a lot of gas down there, even after a decade of drilling.

If New Jersey Gov. Chris Christie was hoping for a return invite to the big CPAC convention this year, he probably should have thought of that before he bad-mouthed House Speaker John Boehner a couple of months back.

Christie was incensed by the House's failure to pass a relief bill helping victims of Superstorm Sandy, which hammered New Jersey and the rest of the Northeast last autumn. In typical Christie style, he did not pull any punches.

File this one under Sisyphean tasks: The government of Iceland is drafting plans to ban pornography both online and in print.

Supporters of the ban, proposed by Interior Minister Ogmundur Jonasson, says it will shield children from harm.

Writing in the Guardian, Halla Gunnarsdottir, political adviser to Jonasson, said: