NPR Staff

The Vieuxtemps Guarneri is a violin that is older than the United States of America — 273 years old, to be exact. It recently became the most expensive violin in the world, selling for an estimated $16 million. Its new owner anonymously donated the historic instrument to violinist Anne Akiko Meyers, on loan for the rest of her life.

In the past year, Russia has been a decisive player in several events on the international stage — often to the chagrin of the Obama administration. It gave asylum to former NSA contractor Edward Snowden, blocked United Nations efforts to impose sanctions against the Syrian government and sent troops into Ukraine.

Confused about the Common Core State Standards? Join the club. That's not to say the new benchmarks in reading and math are good or bad, working smoothly or kicking up sparks as the wheels come off. It is simply an acknowledgement that, when the vast majority of U.S. states adopt a single set of educational standards all at roughly the same time, a little confusion is inevitable.

Below is a handy FAQ about Common Core. We'll continue answering your questions in the coming months. You can post them in the comments section, or on Twitter and Facebook using #commonq.

For a jazz trumpet player, you couldn't be more on top of the world than Ambrose Akinmusire. The 32-year-old is looking good on the cover of this month's DownBeat, and he's managed to please the jazz critics and connect with audiences.

Monday, 105 lawmakers from both parties sent a letter to Secretary of Defense Chuck Hagel, urging him to change a relatively obscure uniform requirement for the U.S. armed forces that some argue infringes on religious beliefs.

People who observe religions that require specific hair or dress traditions have to seek an accommodation from a superior to break the Defense Department's uniform requirements.

As an international armada of planes, ships and helicopters continues to comb the Indian Ocean for any sign of Malaysian Airlines flight 370, now missing for more than a week, Interpol confirms that two passengers aboard that flight were traveling on stolen passports.

Aviation experts say the incident highlights a major security gap at many airports: It is simply too easy to board a flight using someone else's photo ID.

When it comes to media, parents all want to know: How much is too much for my child?

Dr. Dimitri Christakis, a pediatrician, professor and father of two, has spent a lot of time thinking about the effects of media on young children. Christakis tells NPR's Arun Rath that not all TV is bad.

It has been more than a week since Malaysia Airlines Flight 370 disappeared, and despite a massive search effort, the whereabouts of the plane and the 239 people on board are unknown.

The airline has told the families and friends of those missing to "expect the worst."

But it's tough for families to grieve without knowing the answer to a crucial question: Could my loved one still be alive?

Dr. Pauline Boss works with people in this kind of situation. She's the author of Loss, Trauma and Resilience and a professor emeritus at the University of Minnesota.

The disappearance of Michael Rockefeller in November of 1961 was an international incident; Rockeller, just 23, was the scion of one of the world's richest families. He had gone to New Guinea to collect native art for his father's newly founded Museum of Primitive Art in New York — and then, he had vanished.

Malaysia's prime minister says he is now certain that someone disabled the communication systems on the passenger jet that disappeared last week with 239 people aboard.

The missing Malaysia Airlines Boeing 777 flew more than six and a half hours after its last communication with air traffic control, Malaysia's Prime Minister Najib Razak said in a news conference early Saturday.

"These movements are consistent with deliberate action by someone on the plane," he said.

This is the conclusion to an All Things Considered series that imagines a counterfactual history of World War I.

This year marks the centennial of the outbreak of World War I. What started as a beef between the Austro-Hungarian Empire and Serbia unleashed a clash that brought in Russia, Italy, France, Germany, England and eventually the United States.

There are intense debates underway in the United States over the question of targeted killings of terrorist suspects abroad – particularly when those individuals are U.S. citizens.

This is part of an All Things Considered series that imagines a counterfactual history of World War I.

This summer marks 100 years since the start of World War I. Many argue that the conflict was inevitable — but what if it wasn't?

This is part of an All Things Considered series that imagines a counterfactual history of World War I.

This summer marks 100 years since the start of World War I. Many argue that the conflict was inevitable — but what if it wasn't?

In 1966, psychedelic drug advocate and former Harvard professor Timothy Leary appeared on the Merv Griffin Show.

"I'm in the unfortunate situation of being about 20 years ahead of my time," Leary said. When asked how many times he'd taken LSD, he answered 311. The audience gasped.

Leary was fired for experimenting with psychedelics on undergraduates, and before long, LSD was classified as a Schedule I drug, meaning it had "no known medical use." Research on the medical uses of LSD and other psychedelics came to a halt.

Pages