On SCIENCE IN THE NEWS: Medical science has eliminated only one disease, smallpox. Bill and Melinda Gates called last year for a campaign to stop malaria. But experts differ on the idea. Some say existing measures could reduce cases by 90 percent.

Also on SCIENCE IN THE NEWS: A study finds that people who stop smoking often influence other smokers to quit.

Also on SCIENCE IN THE NEWS: A study shows England's Stonehenge was used as a burial ground for 500 years.

On SCIENCE IN THE NEWS: The latest developments in research into the most common form of dementia.

Also on SCIENCE IN THE NEWS: Scientists have confirmed that the huge dinosaur Tyrannosaurus Rex was an ancestor of modern chickens.

On SCIENCE IN THE NEWS: A guide to common emergencies such as choking, heart attacks, accidental poisonings and severe bleeding.

Also on SCIENCE IN THE NEWS: Researchers may someday copy proteins found in alligator blood to produce infection-fighting drugs for people.

Also on SCIENCE IN THE NEWS: A meningitis vaccine proves successful in Uganda. And a study suggests genetic reasons for living longer.

On SCIENCE IN THE NEWS: A look at some of the major competitions for high school students from around the world.

Also on SCIENCE IN THE NEWS: Archeologists find what they are calling the oldest gold objects ever discovered in the Americas.

On SCIENCE IN THE NEWS: Supporters say it helps the public understand how important sharks are to the environment. Opponents say shark diving that involves feeding can make the animals aggressive.

Also on SCIENCE IN THE NEWS: Scientists find evidence of an ancient flying reptile. And a study uncovers the secrets of DEET.

Also on SCIENCE IN THE NEWS: An experimental drug shows promise against a worm disease. And the Grand Canyon could be much older than scientists have thought.

On SCIENCE IN THE NEWS: A look at recent findings about babies and intelligence.

On SCIENCE IN THE NEWS: A look at recent studies of coral reefs. Some scientists say rising temperatures have damaged almost half around the world. Yet many reefs stay colorful and healthy.

Also on SCIENCE IN THE NEWS: An effort to find evidence of climate change in plants. And researchers develop a kind of rubber that can repair itself.

Also on SCIENCE IN THE NEWS: A common disease many people have never heard of. And scientists say people with blue eyes are genetically related.

On SCIENCE IN THE NEWS: Over the years, polio experts have had to learn to deal with surprises.

On SCIENCE IN THE NEWS: Information about headaches, from the mildly unpleasant to the extremely painful.

Also on SCIENCE IN THE NEWS: Concerns about skin lightening products. And researchers study a possible link between finger size and osteoarthritis.