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Developed more than 200 years ago and found in households around the world, chlorine bleach is among the most widely used disinfectants, yet scientists never have understood exactly how the familiar product kills bacteria.

The risk of non-AIDS cancer is higher for individuals infected with HIV than for the general population, according to a meta-analysis presented at the American Association for Cancer Research's Seventh Annual International Conference on Frontiers in Cancer Prevention Research.

A drug based on a chemical found in garlic can treat diabetes types I and II when taken as a tablet, a new study shows.

All of us have experienced being in a new place and feeling certain that we have been there before. A new report published in Current Directions in Psychological Science describes recent findings about deja vu, including the many similarities that exist between déjà vu and our understanding of human recognition memory.

The cancer preventive properties of broccoli and other cruciferous vegetables appear to work specifically in smokers, according to new research.

An engineering student reports on the manufacturing of synthetic cartilage similar to human cartilage, for medical use. Protection of the knee for disabled people with prostheses may be one of the first applications.

ECG tests commonly given to people with suspected angina to predict the likelihood future of heart disease have limited accuracy, according to a new study.

The medicinal herb Ginkgo biloba does not reduce the risk of dementia or Alzheimer's disease development in either the healthy elderly or those with mild cognitive impairment, according to a large multicenter trial.

Sleep helps the mind learn complicated tasks and helps people recover learning they otherwise thought they had forgotten. Using a test that involved learning to play video games, researchers showed for the first time that people who had "forgotten" how to perform a complex task 12 hours after training found that those abilities were restored after a night's sleep.

Inside every axon is a dendrite waiting to get out. Scientists converted mature axons into dendrites by banishing a protein crucial for neuron development. The results suggest that this transformation could occur after nerve cell damage.