The lungs replenish the body with life-giving oxygen. Learn about the anatomy of the lungs, how the organs make respiration possible, and how they are vulnerable to illnesses.
How do you measure something that destroys everything it touches? That’s an essential question for tornado researchers. After he narrowly escaped the largest twister on record—a two-and-a-half-mile-wide behemoth with 300-mile-an-hour winds
