An experimental vaccine may help cocaine addicts break the cycle of dependency. Other addiction vaccines could follow

Anger, depression and stress can all raise the risk of heart disease -- but a new study shows that chronic anxiety may be even more harmful

New research shows that a common, inedible prairie plant can be harvested on a large scale and distilled into an efficient fuel source

Utah researchers find that drivers on cell phones drive sluggishly, clogging traffic and lengthening your commute

Utah researchers find drivers on cell phones drive sluggishly, clogging traffic and lengthening your commute

A new study suggests that male monkeys trade favors with females for sex -- and that the market price depends on availability

Environmentalist and author Lester Brown lays out a robust plan for curbing climate change. Getting the world's politicians to buy it, however, is another question

A new survey in Chicago finds that about half of doctors occasionally prescribe their patients sham treatments

A recent study says doctors are performing too many unwarranted CT scans, exposing patients to cancer-causing radiation

Did Tatiana, the tiger that killed a zoo-goer on Christmas Day, attack for no reason? Did she have a bone to pick with men who taunted her? Or could it have been stress?

Astronomers are hoping for a spectacular high-impact collision as asteroid 2007 WD5 zooms toward Mars

Brothers and sisters of autistic kids are in need of attention too. Here's how a mother copes -- and what experts say

If we're using fluorescent bulbs and solar panels, but taking 14 car trips a day, how eco-friendly is our lifestyle, really?

The global fishing industry is increasingly trawling the high seas for bottom-dwelling fish -- a practice environmentalists say is the world's most destructive business

Just a few minutes of moderate daily exercise may stave off the signs of dementia in the elderly, a new study suggests

A breakthrough study in mice points the way to reversing symptoms of Fragile X Syndrome -- and gives hope for treating other autistic disorders

A comprehensive study finds that abortion and miscarriage lead to low birth weight and preterm birth. But is 40-year-old data still relevant today?

Several new studies show that a simple backrub offers significant pain relief for patients after major surgery

If we're using fluorescent bulbs in our lamps and solar panels on the roof, but averaging 14 car trips a day, how eco-friendly is our lifestyle, really?

A popular purveyor of atheism ventures into brain science, with a study that he contends is the first to show how the brain processes belief

It took a stern lecture, lots of booing and a bureaucrat's breakdown to get the U.S. to sign on

The world came together to solve the climate change crisis, and dragged along the U.S., kicking and screaming

At the UN climate change summit in Bali, global deforestation -- an oft-forgotten source of CO2 emissions -- is finally getting attention

A routine childhood vaccine is being recalled, sparking a shortage -- but no real health risks. Alice Park explains the recall

A new study shows that this once-popular breast-cancer therapy proves ineffective

The tranquilizing drug ketamine is undergoing a resurgence in emergency medical settings. It's riskier for some patients than others

It took a stern lecture by the UN Secretary General, lots of booing and a bureaucrat's breakdown to get the U.S. to sign on to the climate changeagreement

Two new studies suggest that being overweight as a kid can lead to heart disease and greater risk of disease-related death in adulthood

The new Presidential Climate Action Plan sets forth a straightforward plan: To curb global warming, the White House -- and the U.S. -- must first go green at home at home

Genes that regulate the brain's sensitivity to dopamine -- a chemical involved in addiction and motivation -- can affect the ability to learn from our errors

Hoping for a post-Kyoto protocol 185 delegates will convene the most critical climate change talks in a decade

With time dwindling, delegates from 185 countries will convene the most critical talks on climate change in a decade -- and start hashing out a new, post-Kyoto protocol

We've changed the energy- producing rules to prevent acid rain and smog. Now each of us can take a seat at the negotiations on climate change next month in Bali to eliminate carbon dioxide produced by burning fossil fuel

Bosses take note: A new study of the brain shows that rewards for good work satisfy us more when others get less

Yellowstone's geysers and vents may hold the keys to pharmaceutical and industrial breakthroughs. But should the park profit from it?

Morality and empathy are writ deep in our genes, as are savagery and bloodlust. Science is learning what makes us both noble and terrible--and perhaps what can make us better

A U.N. panel's final report on climate change underscores the immense challenge facing the world

Scientists have developed a robotic cockroach that can change the herding behavior of real insects -- and coax them into going where they normally wouldn't

Drugs won't lead to dramatic weight loss, a study finds, but they do take off pounds and have other health benefits

With a wildly popular $100 million eco-education theme park, and citizens who self-inflict carbon-emissions caps, Britain aims to show the world how green living is done

In one of the world's largest public-health collaborations, 155 experts from 50 countries have a plan to tackle the world's deadliest diseases

Nine governors from the coal-hungry Midwest sign a landmark deal to cut carbon emissions, leaving the rest of the US wondering whether Washington will ever take action