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When it's hot and humid, you probably don't want to move much and aren't very hungry. The same goes for cows; but when they don't eat, farmers lose money. Using weather data, a new app called Thermal Aid detects the threat of heat stress and offers farmers tips to keep their cows healthy.

When Republican Mitt Romney tapped House budget chairman Paul Ryan to be his vice presidential running mate, the decision forced both campaigns to focus on Medicare. The Ryan pick was a 180-degree turn from Romney's original premise, which was to focus exclusively on President Obama and the economy.

Republican presidential candidate Mitt Romney discarded his increasingly inert better-safe-than-sorry campaign strategy Saturday when he named budget hawk and Democratic bete noire Rep. Paul Ryan of Wisconsin as his running mate. But the pick has handed Democrats a trove of material to use in an effort to weaken the GOP ticket's appeal among independent voters, women and senior citizens.

The London 2012 Olympics are officially over, but people are still buzzing about Sunday's closing ceremony. It included many of the highlights of British culture and history that weren't in London's opening ceremony. And in America, some viewers are angry about what was left out of the U.S. feed.

Andy Cohen made the cable channel an unlikely focus of water-cooler talk by developing the Real Housewives series. After work, he hosts a nightly talk show — and he's not looking to stop doing either anytime soon.

Iran is facing its most serious challenge since the war with Iraq in the 1980s.

It's been more than a week since the Mars rover Curiosity made its successful landing on the Red Planet. Curiosity is by far the most technologically advanced rover to reach the planet's surface. David Greene talks to astrophysicist Neal DeGrasse Tyson, director of the Hayden Planetarium in New York City, about Curiosity's two-year visit to Mars.

It was just a year ago that the House rejected a deal with President Obama and threatened to allow the U.S. to default on debt obligations coming due. The Tea Party refusal to raise the debt ceiling led to a downgrade in U.S. credit and a selloff in the markets. NPR's David Welna reports on what's changed since then and what hasn't.

The Bourne Legacy is the latest movie to recast a main character in order to continue the franchise. But from Bond to Bewitched, Batman to Dumbledore, Hollywood has never been afraid to dump old stars and seek fresh blood for the sake of a character's longevity.

You don't have to have big bucks to join the latest trend in philanthropy. Soup groups around the country let diners pool their money to support deserving local initiatives. In Philadelphia, one dinner raised $225 for a teacher's class project.