NPR News

In astronomical terms, a blue moon really doesn't denote that long a time span. In fact, a blue moon happens once every 2.7 years on average.

Still, it's a special event that, at least using its modern definition, happens when there are two full moons in a single month.

Today (Aug. 1) we'll see a full-moon and that is a prelude to the blue moon of Aug. 31. As Space.com reports, the Aug. 31 moon will reach its full phase during the day.

Scientists reported new evidence Wednesday that supports a provocative theory about cancer.

Three separate teams of scientists said they had, for the first time, shown that so-called cancer stem cells can be found naturally in brain tumors and early forms of skin and colon cancer.

Evidence has been mounting in recent years for the existence of these cells, which would be especially insidious. They are believed to resist standard chemotherapy and radiation and fuel the growth of tumors and relapses.

For the first time ever, the United States Postal Service has defaulted on a payment to the Treasury.

The USPS warned of a default in a statement on Monday. It it would not make the $5.5 billion payment due today and that it would also default on a $5.6 billion payment due Sept. 30. Both of those payments are federally mandated and go toward prefunding retiree health benefits.

Transcript

STEVE INSKEEP, HOST:

The Olympics are a quest to be the best. But some Olympians are accused of purposely playing badly at badminton. The Badminton World Federation has launched disciplinary proceedings against four women's doubles pairs. First, the world champions, who are Chinese, faced off against opponents from South Korea. And spectators started booing when the players seemed to be making simple errors on purpose.

MELISSA BLOCK, HOST:

British cyclist Bradley Wiggins has won the gold medal in the men's individual time trial event, beating Germany's Tony Martin by 42 seconds. He took 50 minutes and 39 seconds to cover the course of 49 kilometers (just under 30.5 miles).

Martin took silver, and the bronze went to Britain's Chris Froome, who played a vital support role as Wiggins' teammate in his Tour de France victory last month.

Eight Olympic badminton athletes have been thrown out of the London Games after being charged by the Badminton World Federation with "not using one's best efforts to win a match" — which is against the rules of the sport. Because even some journalists may have forgotten badminton's rules, it seemed time to take a fresh look.

In London today the Swedish heir to a fortune worth billions of dollars pleaded guilty to "preventing the lawful and decent burial of his wife" and the court heard that Eva Rausing's body may have been lying beneath "bin bags, clothing and bed linen" for as long as two months, the BBC reports.