Company will announce the second generation Zune, the Web site BetaNews reported.

People who don't finish high school are at a higher risk of developing dementia and Alzheimer's disease compared to people with more education, regardless of lifestyle choices and characteristics such as income, occupation, physical activity and smoking, according to a new study.

People treated with the drug minocycline within six to 24 hours after a stroke had significantly fewer disabilities, according to a new study. Researchers say minocycline may be an alternative treatment for stroke because current treatments only work during the first few hours after the onset of symptoms, and many people don't get to the hospital in time to be treated.

An unprecedented development plan to link South America's economies through new transportation, energy and telecommunications projects could destroy much of the Amazon rainforest in coming decades, according to a new study. Researchers show that IIRSA's development projects will coincide with mounting pressures on the Amazon's ecosystem and its traditional communities. These pressures include climate change; logging; deforestation for agriculture; and mineral exploitation, as well as the impending boom in biofuel crops such as sugar cane.