Making yogurt requires bacteria — but which strains of bacteria? There are dozens to choose from, and that choice affects yogurt's tartness and texture.
Sometimes our eyes are just drawn to the top of a list. Using a regular e-mail of headlines sent out to economists, a study found the ones listed higher get read more — and cited more in future work.
Renee Montagne hears about the latest Iranian reaction to the nuclear deal from the Carnegie Endowment's Karim Sadjadpour, who explains what this means for Iran's future as a regional power.
Not everyone is cheering the nuclear agreement between world powers and Iran. Among the critics is Saeed al Batal, a Syrian photographer who decries Iran's support of President Bashar al-Assad.
The lifting of an arms embargoon Iran alarms U.S. allies in the Middle East. Israel, Saudi Arabia and the United Arab Emirates want more weapons to counter an anticipated Iranian arms-buying spree.
The U.S. golfing phenom won the first two majors of the year, and this weekend he goes for a third at the British Open. It's an achievement that Jack Nicklaus, Arnold Palmer and Tiger Woods.
NPR gets the back story of the years-long negotiations that produced the Iran nuclear deal from journalist Robin Wright. She's traveled to Tehran and spoken with negotiators on both sides of the deal.
The nuclear deal with Iran has some hard-fought gains for the U.S. and other world powers seeking to limit Iran's nuclear program. But critics worry the bulky agreement still gives Iran wiggle room.
An AP investigation has found that the fewer the airlines that serve an airport, the costlier its flights are. Recent mergers have cut the number of major U.S. air carriers from nine to four.
Jurors in the trial James Holmes heard closing arguments Tuesday. Colorado Public Radio's Ben Markus reports on the cases made for and against Holmes' insanity at the time of the killings.
In touting Tuesday's Iran accord, President Obama said it would lend strength to future U.S. presidents. But several Republicans vying to be next in the Oval Office strongly disagreed with the deal.
In Greece, not all the smart, young people are leaving. Some are using the crisis as an opportunity to start a new business — including one woman who want to make trucking in Greece more efficient.
As part of the nuclear deal, an embargo on selling conventional arms to Iran will be lifted in five years. This makes U.S. allies in the Middle East uneasy, and they may want more weapons themselves.
U.S. and Iranian officials are praising the nuclear agreement reached Tuesday. For more on the reaction in Israel, David Greene talks to journalist Daniel Estrin in Jerusalem.
American and Iranian officials are praising the nuclear agreement reached in Vienna, Austria, on Tuesday. But Iran is a regional rival to many Arab states — many would say a regional threat.
World leaders struck a landmark deal Tuesday to curb Iran's nuclear program, and President Obama delivered a statement from the White House.
The president promised to veto any congressional attempt to reject the deal he and other Western powers reached early Tuesday. NPR's Tamara Keith and Michele Kelemen provide analysis of his remarks.
A feline stowaway survived a 28-mile journey in the piping-hot engine compartment of a pickup truck.
Renee Montagne talks with Thomas Erdbrink, Tehran bureau chief for the New York Times, about how Iranians are reacting to the nuclear deal reached with the U.S. and other western powers.
If Congress passes a measure of disapproval regarding the lifting of Iran sanctions, President Obama likely would veto it — meaning a two-thirds majority would have to opposed Tuesday's agreement.