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AILSA CHANG, HOST:

When the fourth-graders in Mrs. Marlem Diaz-Brown's class returned to school on Monday, they were tasked with writing their first essay of the year. The topic was familiar: Hurricane Irma.

By the time I visited, they had worked out their introduction and evidence paragraphs and were brainstorming their personal experiences. To help them remember, Mrs. D-B had them draw out a timeline — starting Friday before the storm. Then, based on their drawings, they could start to talk about — and eventually, write about — what they experienced.

When 2-month-old Isaac Enrique Sanchez was diagnosed with pyloric stenosis, a condition that causes vomiting, dehydration and weight loss in infants, his parents were told that their son's condition was curable. The problem was that no hospital in the Rio Grande Valley of Texas had a pediatric surgery team capable of performing the operation on his stomach.

Boxer Jake LaMotta, the former world middleweight champion and the inspiration for the movie Raging Bull, has died at age 95. His longtime partner Denise Baker told NPR that LaMotta died Tuesday from complications of pneumonia.

Raging Bull, directed by Martin Scorsese and starring Robert De Niro, won an Oscar for De Niro and is now regarded as a modern classic. It vividly depicts LaMotta's struggles in his career, as well as some of the domestic violence that the boxer has admitted to perpetrating.

For the first time, scientists have edited the DNA in human embryos to make a fundamental discovery about the earliest days of human development.

By modifying a key gene in very early-stage embryos, the researchers demonstrated that a gene plays a crucial role in making sure embryos develop normally, the scientists say.

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