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There's a trend in the startup world toward combining business and smartphone apps with altruistic goals.

At a recent hackathon, where tech developers get together to create new apps and programs in a short amount of time, about a dozen University of Washington computer science students work diligently on their projects.

By the time today's K-12 students grow up, the challenges posed by climate change are expected to be severe and sweeping. Now, for the first time, new nationwide science standards due out soon will recommend that U.S. public school students learn about the climatic shift taking place.

Mark McCaffrey of the National Center for Science Education says the lessons will fill a big gap.

There once was a wise old basketball coach named Arad McCutchan who led the Evansville Purple Aces to five national championships in the small-college division, dressing his Purple Aces in bright orange T-shirts. I've been reminded of this recently as a number of grubby athletic directors have sold out to the sporting goods companies, allowing their teams to be costumed in the most hideous outfits.

After weeks and months of public debate and speculation about the legal fate of same-sex marriage, the second round of arguments takes place at the U.S. Supreme Court on Wednesday.

At the U.S. Supreme Court on Tuesday, the moment had finally arrived. After four years of litigation in the lower courts, the Supreme Court was hearing a challenge to California's ban on same-sex marriage. But minutes into oral arguments, it became clear that the justices may not give either side the clear-cut victory it wants.

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It's ALL THINGS CONSIDERED from NPR News. I'm Audie Cornish.

All this week, we're reporting on a remarkable increase in the size of the country's disability programs. Fourteen million Americans now receive a monthly disability check from the government. The number has roughly doubled every 15 years. As we've reported, there are many, complicated reasons for the increase. There's also one, very simple one: Congress. In 1984, Congress changed the definition of disability. Lawmakers broadened it, and made it more vague.

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We'll learn what the court decides to do about DOMA and California's Proposition 8 sometime this summer. Its options vary widely. But no matter what the result, there will be political implications.

NPR national political correspondent Mara Liasson joins us to walk through some of them.

And, Mara, first, let's talk briefly about this really sea change in public opinion now in favor of same-sex marriage. Could the court reverse that tide in any way?

The government of Myanmar has imposed a dawn-to-dusk curfew in three townships amid growing anti-Muslim violence that is drawing closer to the main city of Yangon.

Violence against Muslims has been a major problem in the country as President Thein Sein introduces democratic changes after decades of military rule.

Here's more from The Associated Press:

A gun store owner in Arizona says he is refusing to sell Mark Kelly a semi-automatic rifle.

Kelly, along with his wife Gabrielle Giffords, who was shot in the head during a shooting rampage at an event with her constituents, have become advocates for stricter gun controls. Kelly posted on Facebook that he had bought an AR-15. He said he didn't have possession yet, but he was planning on turning it over to Tucson Police once he did.