Credit Ian Harrowell, Christine Austin, Manish Arora / Harvard School of Public Health
This model of a molar shows color-coded barium banding patterns that reveal weaning age.
Credit Alyson Hurt, Adam Cole / NPR / Christine Austin / Westmead Centre for Oral Health
Top: Lines on a 100,000-year-old Neanderthal tooth mark the passage of time. Bottom: The distribution of barium shows dietary transition: low barium before birth (1), high barium during breast-feeding (2) and falling barium as the Neanderthal transitions to a mixed diet (3).
Our closest relatives, chimpanzees and gorillas, breast-feed their offspring for several years. Some baby orangutans nurse until they are 7 years old.
But modern humans wean much earlier. In preindustrial societies, babies stop nursing after about two years. Which raises the question: How did we get that way? When did we make the evolutionary shift from apelike parenting to the short breast-feeding period of humans?
George Plimpton boxed with Archie Moore, played quarterback for the Detroit Lions, and played percussion for the New York Philharmonic. He did these jobs, and many others, as an amateur. Plimpton was a professional writer. A new documentary about his life makes the case that Plimpton's best story was his own story, as NPR's Joel Rose reports.
JOEL ROSE, BYLINE: When you listen to George Plimpton's voice, it's like hearing echoes of a New York that no longer exists.
For the first time, the U.S. government has acknowledged killing four American citizens in lethal drone strikes far outside traditional battlefields, confirming information that had been widely known but has only recently been unclassified under orders of the president.
Ibrahim Shomali, a Palestinian priest, offers Communion under the olive trees of the Cremisan Valley in the Israeli-occupied West Bank. This is part of a regular protest against Israeli plans to build a section of its West Bank barrier here, which would separate Palestinians from their agricultural lands.
Credit Emily Harris / NPR
Israeli army Capt. Barak Raz stands on a concrete wall that is part of the barrier separating Israelis and Palestinians in the West Bank. Soldiers climb to this spot during Palestinian protests to disperse crowds with tear gas or a foul-smelling liquid nicknamed "skunk."
Israeli army Capt. Barak Raz climbs a metal staircase to the top of a high concrete wall that is part of Israel's West Bank barrier. From his perch, he overlooks both the Palestinian village of Bil'in and Modin Illit, the largest Jewish settlement in the West Bank, with some 50,000 residents.
The barrier here used to be a fence. After many confrontations with Israeli soldiers, Palestinian villagers won a court case, and the fence was moved off some of their land. But since the barrier was moved closer to an Israeli settlement, it was rebuilt as a wall.
What is the case against Wisconsin farmer Vernon Hershberger really about? It depends on whom you ask.
To hear the prosecution, it's about licensing, not raw milk: Hershberger, a dairy farmer hailing from the town of Loganville, is on trial this week for operating without three licenses. He's also accused of continuing to sell raw milk to members of his private club after he was ordered not to.
If convicted, the father of 10 faces more than a year in jail and more than $10,000 in fines.
After five marathon sessions debating 150 proposed amendments, the Senate Judiciary Committee approved a landmark rewriting of the nation's immigration laws this week — and the bill emerged largely intact.
Three Republicans voted with the panel's 10 Democrats on Tuesday night to forward the bill to the full Senate. That strong showing followed a wrenching choice for Democrats on the committee: whether to risk shattering support for the bill by amending it to recognize equal rights for same-sex couples.
"I'm shocked by the optimism here," Howard Yana-Shapiro, the chief agricultural officer for Mars Inc. said Tuesday to the audience of the Chicago Council on Global Affairs' Global Food Security Symposium in Washington, D.C.
Seated there before him were some of the leaders from the wealthiest international organizations and multinational companies of the fight to end hunger. And Shapiro told them they weren't even close.
Public opinion about the scandals plaguing the Obama administration is decidedly mixed.
Republicans believe that the trio of controversies — concerning Benghazi, the IRS, and the Justice Department snooping on media phone records — are evidence enough that President Obama is either running a government motivated by partisan politics, or is badly out of touch.
Democrats, however, are proving to be much more forgiving.
Mount Moriah is a rock band formed around the duo of guitarist Jenks Miller and singer Heather McEntire. Its second full-length album, the recent Miracle Temple, combines the strum and twang of Southern rock with vocals that hit hard emotionally.
On this installment of World Cafe, host David Dye discusses with McEntire the complexity of Mount Moriah's sound, as well as her push to explore the nuances in her vocals.
A British driver who struck a cyclist with her car — and who then bragged about the incident on Twitter — has issued an apology. The incident caused an uproar after the collision Sunday.
"Definitely knocked a cyclist off his bike earlier - I have right of way he doesn't even pay road tax! #bloodycyclist," tweeted Emma Way, in a message that has been widely circulated despite her apparent attempts to delete it, and seemingly her Twitter account, @EmmaWay20.