Why do zebras have stripes?

After evolving from horses some two million years ago, zebras earned their stripes. But why? A team of scientists has found part of the answer.

Looking at lupus: An attack from within

Lupus is a complex and mysterious disorder, when the cells that are supposed to protect your body from disease assault your own healthy cells and tissues.

Holding their attention: A bit about ADHD

Attention deficit hyperactivity disorder, or ADHD, was once considered a problem that children outgrew. If they didn’t, their parents were often blamed for bad parenting.