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Right now we're in the peak of the fall migration season. Billions of birds are making their way south. Many species travel at night, and a new study shows how artificial light can affect their journey through darkness. NPR's Nell Greenfieldboyce reports.

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Just off the Las Vegas Strip, there's a big white building in a run-of-the-mill office complex where tourists can pay as little as $50 to shoot 25 rounds from an AK-47. A billboard out front with a busty woman wielding a machine gun advertises the "ultimate shooting experience."

From the parking lot, you can see the Mandalay Bay. That's the hotel where 58 people were killed and nearly 500 were wounded on Sunday night during a country music festival.

Insurers, hospitals and health advocates are waiting for Gov. Jerry Brown to deal the drug lobby a rare defeat, by signing legislation that would force pharmaceutical companies to justify big price hikes on drugs in California.

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President Trump has surprised a lot of people with some comments on Puerto Rico's debt crisis. The U.S. territory owes some $73 billion to bondholders, money that it's been unable to pay. In an interview on Fox News last night, the president seemed to suggest that the bondholders aren't going to get their money back.

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Today, three scientists won the Nobel Prize in Chemistry for developing a new way to image biological molecules. NPR's Nell Greenfieldboyce has more on the winners.

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How A Bump Stock Device Can Alter Guns

Oct 4, 2017

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After the Food and Drug Administration inspected a Massachusetts bakery, they made some objections about allergens and cleanliness, proper precautions with bread dough and the listing of one particular ingredient in the granola.

In the hours just after the massacre in Las Vegas, some fake news started showing up on Google and Facebook. A man was falsely accused of being the shooter. His name bubbled up on Facebook emergency sites and when you searched his name on Google, links of sites connecting him with the shooting topped the first page.

It appears to be another case of automation working so fast that humans can't keep pace. Unfortunately, these powerful tech companies continue to be a main destination for news and it's not clear how they can solve the problem.

Fresh evidence that the body's immune system interacts directly with the brain could lead to a new understanding of diseases from multiple sclerosis to Alzheimer's.

A study of human and monkey brains found lymphatic vessels — a key part of the body's immune system — in a membrane that surrounds the brain and nervous system, a team reported Tuesday in the online journal eLife.

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A moment now to remember one of rock music's most-beloved musicians.

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TOM PETTY AND THE HEARTBREAKERS: (Singing) She was an American girl.

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We are only about 24 hours past this shooting. NPR's Tom Gjelten, you've been covering this all day. And I want to ask you, what do you think we should expect that of the investigation tomorrow and in the coming days?

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Late this morning, President Trump solemnly addressed the nation.

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