Health

Stimulating the brain with a very small electrical current through the forehead could boost a student's ability to learn and remember basic mathematics, a provocative experiment suggests.

The work, published online Thursday by the journal Current Biology, could help those who struggle with mental arithmetic. But the study was small and the long-term effect wasn't profound.

When the Senate voted Tuesday to make Marilyn Tavenner the official administrator of the Centers for Medicare and Medicaid Services, it was the first time the world's greatest deliberative body had approved someone to head the huge health agency since 2004.

That's right, you have to go way back to the Bush administration to find Dr. Mark McClellan, the last person to be officially put in the post.

A study published online recently in the journal Environmental Health Perspectives documented slightly elevated levels of arsenic in samples of chicken purchased at grocery stores in 10 cities in the U.S.

So how did trace amounts of this toxin end up in supermarket poultry?

Perhaps you've noticed a toddler's sagging swim diaper and wondered if it's really keeping the poop out of your neighborhood pool.

The Centers for Disease Control and Prevention has the answer for you: no.

Last summer, researchers at the federal public health agency collected 161 filter samples from public swimming pools in the Atlanta area. More than half of those samples, 58 percent, were contaminated with E. coli.

That, the CDC reported today, "signifies that swimmers introduced fecal matter into pool water."

Transcript

MICHEL MARTIN, HOST:

I'm Michel Martin and this is TELL ME MORE from NPR News. Later in the program family members of both the suspects in the Cleveland kidnappings and the Boston Marathon bombings have denounced them. And that made us wonder about the family members of other people who have been accused of horrible acts. So we reached out to two of them - the daughter of a serial killer and the brother of the Unibomber will both be with us in just a few minutes.

Transcript

DAVID GREENE, HOST:

This is MORNING EDITION from NPR News. Good morning. I'm David Greene.

STEVE INSKEEP, HOST:

And I'm Steve Inskeep.

We're going to look closely this morning at a dramatic advance in science.

GREENE: And also its far-reaching implications. The advance involves embryonic stem cell research.

INSKEEP: Which scientists see as a route to dramatic advances in medical treatment. Researchers have now figured out how to make embryonic stem cells that carry a specific individual's DNA.

The news that U.S. scientists have successfully cloned a human embryo seems almost certain to rekindle a political fight that has raged, on and off, since the announcement of the creation of Dolly the sheep in 1997.