Monkey study produces 'one-two punch' that combines an HIV vaccine and an immune-stimulating drug

Diet sodas do not appear to pose the same danger, researcher says

Brazilian discovery is first to show dinosaurs lived alongside an early ancestor, researchers say

Results are encouraging and human trials are underway, researchers say

Researchers don't know if beverages keep you awake or lack of sleep prompts cravings

Study link is strongest in women who have not entered menopause, researchers report

Certain groups should start screening earlier, study suggests

Study found people in more contented U.S. counties lived an extra two years or more

Here are likely symptoms

What weary parents can do