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Anti-Drug PSAs: Do They Work?

The U.S. has spent millions of dollars since the 1980s on anti-drug ads. But research shows that some of these older public service announcements might be counterproductive. Now that the ads are shifting to reach teens who want to rebel, new studies show they may actually be more effective.

E-Cigarettes Bring Smokers Back Inside, For Now

Fewer Americans are buying cigarettes these days, but smokeless products like e-cigarettes are on the rise. They're not regulated like other tobacco products, but the FDA warns that day may yet come.

Oregon's Math Problem: How To Measure Health?

How hard can it be to measure the health of a population? Oregon is finding out it's difficult to decide even what to track. But the state received almost $2 billion in federal funds to improve the health of its residents and to cut costs. The state faces substantial fines if it can't prove it has done the job.

Freaky Friday: Autonomous Tissue Grabbers Are On Their Way

Scientists have deployed hundreds of tiny, experimental robots to help with biopsies. They're as small as a speck of dust. They look like tiny ninja throwing stars. And researchers use magnets to retrieve them.

Why Caffeine In Coffee Is A Miracle Drug For The Tired

Historians tell us that caffeine in coffee helped Western civilization "sober up" and get down to business. Now scientific research shows that at low doses, caffeine improves performance on mental tasks, especially in people who are already tired.

Obama Says New Abortion Laws Turn Back The Clock

President Obama on Friday defended Planned Parenthood at the group's annual meeting and attacked new laws in several states that severely restrict when a woman can have an abortion. "When you read about some of these laws ... you want to make sure you're still living in 2013."

Failure Of Latest HIV Vaccine Test: A 'Huge Disappointment'

An oversight committee halted a big clinical study of an experimental HIV vaccine after a peek at preliminary results showed there was no way the study would be able show the vaccine works. More vaccinated people became infected with HIV than those who got placebo shots.