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Updated Friday at 11:04 a.m. ET.

Lawmakers have called for an investigation into a troubled student loan discharge program one day after an NPR report revealed that the program — meant to erase the student debts of borrowers with significant, permanent disabilities — wasn't helping the vast majority of those who are eligible.

A comet from another star will swing by our sun Dec. 8.

Known as 2I/Borisov, it is the first comet to ever be seen coming from interstellar space. But despite its alien origins, astronomers say it actually looks pretty familiar.

"Borisov is a comet very like what we have in our own solar system," says Michele Bannister, a planetary astronomer at Queen's University Belfast told NPR's Short Wave. Whatever planetary system it formed in, "it's a lot like our own."

A new Gilded Age has emerged in America — a 21st century version.

The wealth of the top 1% of Americans has grown dramatically in the past four decades, squeezing both the middle class and the poor. This is in sharp contrast to Europe and Asia, where the wealth of the 1% has grown at a more constrained pace.

One of opera's leading men, Italian tenor Vittorio Grigolo, was dismissed Thursday by two of the world's most prestigious houses: the Royal Opera in London and New York's Metropolitan Opera.

His firing comes after an investigation by the Royal Opera [RO], which determined that he had demonstrated "inappropriate and aggressive behavior" during an RO tour of Japan in September.

Thousands of people are marching in the streets of Paris, Lyon, Marseilles and other French cities Thursday, as more than 30 unions launch a massive workers' strike that's meant to shut down the country and force President Emmanuel Macron to reevaluate his plans for pension reform.

The strike is being compared to the crippling protests of 1995, which were also triggered by a retirement reform effort and which unraveled the career of former Prime Minister Alain Juppé.

Scientists know that if they transfuse blood from a young mouse to an old one, then they can stave off or even reverse some signs of aging. But they don't know what in the blood is responsible for this remarkable effect.

Researchers now report that they've identified hundreds of proteins in human blood that wax and wane in surprising ways as we age. The findings could provide important clues about which substances in the blood can slow aging.

Updated at 1:43 p.m. ET

Federal law enforcement officials have announced criminal charges against two Russian nationals who operate a hacking organization known as Evil Corp., a group officials say is responsible for one of the most sweeping banking fraud schemes in the past decade.

Updated at 12:43 p.m. ET

House Speaker Nancy Pelosi, D-Calif., announced Thursday morning that House Democrats will move ahead with drafting articles of impeachment against President Trump, though she did not define the scope of those articles.

"His wrongdoing strikes at the very heart of our Constitution," Pelosi said, referring to Trump's efforts to pressure Ukraine to investigate political rivals while hundreds of millions of dollars in military aid were on hold earlier this year.

David Pierce was never someone who sat around watching life go by. He worked as a chef and had a catering business on the side. He sang in his church choir and did community theater, where he met his wife.

Then, in his mid-50s, doctors removed part of Pierce's foot, a complication of diabetes.

"My health just went, kind of really downhill. It really took a turn for the worse," says Pierce, sitting at his dining room table in his tidy home in Apalachin, N.Y. "I couldn't maintain even a part-time schedule."

Earlier this year, an NPR investigation with WAMU and Oregon Public Broadcasting found deep problems in how school districts report restraint and seclusion. Following that investigation, NPR reached out to educators about their experiences with these practices.

Brent McGinn spent a year early in his career working with students who could sometimes hurt themselves.

Inside a bright red building in Redwood City, just south of San Francisco, cooks plunge baskets of french fries into hot oil, make chicken sandwiches and wrap falafel in pita bread.

If you've been in a restaurant kitchen, it's a familiar scene. But what's missing here are waiters and customers. Every dish is placed in a to-go box or bag.

Nearly two years ago NPR profiled Usama Canon, a celebrated Muslim preacher facing his own mortality. He'd been public about his diagnosis of Lou Gehrig's disease, or ALS, a degenerative neurologic condition that robs people of their ability to move, to speak. Eventually it takes your life.

Oakwood Cemetery should not be so noisy at night, but the thousands of crows encamped here this evening will not shut up.

The graveyard, perched near downtown Rochester, Minn., is alive with the creatures yelling from the trees, cutting sharp silhouettes against the gray, late fall sky.

Left to themselves, the crows will eventually make their way to downtown where — intentionally or not — they will rain down poop, creating a slimy mess for city residents as well as staff and patients at the sprawling Mayo Clinic campus.

Across from a Capitol Hill impeachment hearing that President Trump and his allies loudly rebuked, members of the White House legal team and its top legislative aide huddled Wednesday with Senate Republicans over lunch to plot out a potential trial in the upper chamber.

When news broke that California Sen. Kamala Harris was dropping out of the presidential race on Tuesday, some fellow Democratic candidates quickly began ringing alarm bells. Harris was the only nonwhite candidate to have qualified for the next presidential debate on Dec. 19.

"What we're staring at is a DNC debate stage in a few days with no people of color on it, that does not reflect the diversity of our party or our country," former Housing Secretary Julián Castro said. "We need to do better than that."

Dr. Laurie Punch plunged her gloved hands into Sidney Taylor's open chest in a St. Louis hospital's operating room, pushing on his heart to make it pump again, though a bullet had torn through his flesh, collarbone and lung. His pulse had faded to nothing. She needed to get his heart beating.

She couldn't let the bullet win.

A few weeks ago, Elizabeth Warren made huge news with her plan to finance "Medicare for All." But as part of it, the Massachusetts senator made a big change to one of her other major policy goals: she boosted the size of the wealth tax she wants to impose on the very rich: The top rate went from 3% to 6%, giving her trillions more dollars in theoretical revenue to fund the sweeping program.

A U.S. Navy sailor shot and killed two civilian employees of the Defense Department and wounded a third before killing himself at Hawaii's Pearl Harbor military installation.

Rear Adm. Robert Chadwick, commander of Navy Region Hawaii, said the shooting occurred near Dry Dock 2 in the Naval shipyard at Joint Base Pearl Harbor-Hickam.

Chadwick said the male shooter "has tentatively been identified as an active-duty sailor assigned to USS Columbia," a nuclear-powered Los Angeles-class fast attack submarine.

George Zimmerman is suing the family of the teenager he shot nearly eight years ago, seeking more than $100 million from Trayvon Martin's parents, their attorney and others. Zimmerman claims he was the victim of a conspiracy, along with malicious prosecution and defamation.

Martin's family has responded with a statement saying there's no evidence to back Zimmerman's contentions that he was the victim of a conspiracy.

The story of the House Democrats' impeachment report has quickly become all about the phone records.

The majority Democrats on the House Intelligence Committee on Tuesday released a 300-page report detailing the evidence it has accumulated in its impeachment inquiry into President Trump.

Former President Jimmy Carter has been released from a Georgia hospital after being admitted over the weekend to receive treatment for a urinary tract infection.

The Carter Center announced Wednesday the 39th president "looks forward to further rest and recovery at home."

"Former U.S. President Jimmy Carter was discharged from Phoebe Sumter Medical Center this afternoon," Carter Center spokesperson Deanna Congileo said in a statement.