Most of us have no idea what's really going on inside our heads. Yet brain scientists have uncovered details every business leader, parent, and teacher should know--such as the brain's need for physical activity to work at its best. How do we learn? What exactly do sleep and stress do to our brains? Why is multi-tasking a myth? Why is it ...

TMS. Lack of sleep often comes at times when we need to perform at our best. Now brain researchers studying how sleep deprivation impairs memory have found a potential remedy.

Why do we need sleep? Part of the answer may be to strengthen memories.