NPR News

The Oakland A's Bartolo Colon becomes the second player in a week to fail a doping test.

Major League Baseball said Colon is suspended 50 games because he tested positive for elevated levels of testosterone. It was the same thing that got the Giants' Melky Cabrera suspended last week.

It didn't go far, but the NASA rover Curiosity has taken its first test drive on Mars.

"This is how I roll," NASA writes (speaking for Curiosity) with a photo it has released showing the rover's first tracks. "Forward 3 meters, 90 [degree] turn, then back. Electric slide, anyone?"

"We have a fully functioning mobility system," NASA engineer Matt Heverly just told reporters. He said Curiosity ended up moving about 4 1/2 meters during today's test. It also did a full revolution going forward, backed up and did another revolution.

The Mission Continues challenges military veterans — returning home from duty — to use their knowledge and skills to serve and lead in communities across America.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan, in Washington. A congressman skinny dips in holy water and still can't buy a headline because another congressman redefines rape and biology, defies his own party and stands up Piers Morgan. It's Wednesday and time for a...

PIERS MORGAN: Gutless little twerp...

CONAN: Edition of the Political Junkie.

(SOUNDBITE OF POLITICAL JUNKIE INTRO)

PRESIDENT RONALD REAGAN: There you go again.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. Parts of the country have suffered from record heat and drought for several years in a row now, and this summer, it's been just brutal. In past programs, we talked with farmers about their crops. Today, we focus on difficult choices facing ranchers and dairy farmers.

Each year, some 2,000 heart transplants are performed in the U.S., and the number of people on the waiting list is even larger. Between finding the perfect donor to worrying about insurance, the wait can be grueling, but heart transplant social workers are here to help.

Transcript

NEAL CONAN, HOST:

This weekend, a court in Moscow sentenced three women from a previously obscure punk band guilty of hooliganism. They got two years in prison and made Pussy Riot an international sensation. In the Washington Post today, columnist Anne Applebaum writes that for all the attention paid to the case, Madonna's was by far the most damaging, not because she's a serious political figure, but because she isn't.

There's growing evidence that the bacteria in our gut influence our health, including how much we weigh. So what happens when antibiotics knock out some of the microbes that help us?

A study, published online today in the journal Nature, finds that antibiotics make young mice fatter by changing the mix of their gut bacteria.

In Colorado and Iowa, two states considered up for grabs in the presidential race, a battle over alternative energy policy is playing a growing role in the debate between President Obama and Mitt Romney.

Both states have important wind-energy sectors, and Obama's campaign is rolling out new radio ads this week highlighting the president's support for — and Romney's opposition to — extending a tax credit on wind-energy production.

AT&T is on the defensive today, saying that its decision to limit the use of Apple's video-call app Facetime does not violate the FCC's net neutrality rules.

Ever since Apple introduced the application, AT&T has limited its use to Wi-fi. In other words, customers who were using the AT&T network could not make video calls using the built-in app. Last week, AT&T changed that policy, saying it would allow customers on its new "shared data plans" to use the app but that did not apply to those who are on unlimited or tiered plans.

JD McPherson's "big break" came when he introduced himself to producer and bassist Jimmy Sutton of The Four Charms via MySpace. After receiving several of McPherson's demos, Sutton immediately recognized his talent, and the Oklahoma native moved to Chicago to begin recording with Sutton. The pair released a music video for "North Side Gal," which became a viral hit.