Laser-Based Test Hunts Stray Melanoma Cells
The researchers have been developing a laser-based system designed to screen patients' blood from the outside -- spotting tumor cells as they pass through veins in the arm and eliminating the need for a blood draw.

Study: Vitamin D Won’t Help Prevent Type 2 Diabetes
After nearly three years, 24.2% of those taking vitamin D developed diabetes, as did 26.7% of those taking the placebo. This difference isn't statistically significant, researchers said.