ABC News chief medical correspondent Dr. Jennifer Ashton "walks" through the research and shares why you may not need to take as many steps as you think for a healthy life.

Understanding how the brain learns and applies rules is the key to unraveling the neural basis of flexible behavior. A new ...

Professor Raúl Rojas has published a book about how symbols have been used throughout history in mathematics. The work was ...

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...