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Right now, solar panels make electricity. But a team of engineers in California wants to take solar energy one step further. They're trying to create a device that uses sunlight to make a liquid fuel that goes in our gas tanks.

When he was 17, Mike Brodie hopped a train with a Polaroid camera and a pack of film. About 10 years later, he doesn't hop trains and doesn't really photograph, either. But he does have a book out about those years.

Jon Underwood, a British Web designer and self-named "death entrepreneur," helps people talk about the taboo topic over tea and cake. "When we acknowledge that we're going to die, it falls back on ourselves to ask the question, 'Well, in this limited time that I've got, what's important for me to do?' " Underwood says.

Most animals leave their home turf when they reach adulthood to avoid competing with relatives. But here's an exception: More than three decades of dogged research shows that prairie dogs are more likely to disperse when all of their family members are gone.

In NPR's Elise Tries series, correspondent Elise Hu tries out different experiences in East Asia. In rapidly aging Japan, an edible innovation is helping seniors enjoy meals without fear of choking.

A bill making its way through the Senate would make more online retailers collect sales taxes. The battle over the bill pits online retailers against brick-and-mortar stores — and, in some cases, against other online sellers. Amazon has endorsed the bill, while eBay is the loudest voice against it.

It quickly became clear that the "news" was not true. There had been no explosions at the White House and President Obama was fine. But a message on the wire service's Twitter account rattled investors.

After a South Carolina couple adopted a baby girl, her biological father sought full custody. Normally, the Supreme Court does not hear such disputes, but this case tests a federal law meant to stop Native American children's being improperly taken from their families.

On IIII + IIII, Otura Mun and his bandmates weave hip-hop, jazz and dancehall influences into Afro-Cuban music. It's an electronic take on tradition that embraces the human touch.

Same-sex marriage got huge headlines at the Supreme Court last month, but in the world of science and medicine, the case being argued on Monday is far more important. The lawsuit deals with a truly 21st century issue that in some cases can pit drugmakers against patients.