More and more employees are testing positive for illicit drugs
US teen births hit historic low with plunge in minority rate
Study: Racial gap in breast cancer diagnoses has closed
Subway to transition to meat raised without antibiotics
Listeria can't grow on apples, caramel; Why caramel apples?
Why is elephant cancer rare? Answer might help treat humans
The 'man who doesn't breathe' can hold breath for 22 minutes
Ebola kills Liberian doctor, 2 Americans infected