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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.

In the 19th century, Bolivar freed six countries from Spanish rule. Almost 200 years later, the warrior statesman is still a widely celebrated Latin American hero, but his story is also little understood. In a new biography, Marie Arana aims to separate fact from fiction.

Many elected officials say there's a link between immigration and crime, and have even passed tough anti-immigration laws as a result. But some researchers say cities with large immigrant populations boast conditions that depress crime: young families and active, bustling neighborhoods.

The United Farm Workers seemed to be all over Washington this week — lobbying members of Congress and gathering for a big immigration rally outside the Capitol. The union has gotten "a huge injection of leverage" from its role in the immigration debate, one analyst says.