“As bad as things look right now, you have to remember, it’s a cycle.” My old friend Paul was talking and leading me on a hike around Lake Pinnacle at Table Rock State Park. This was in September, ...

Introduction Did you know that playground swings can provide a good lesson in physics—as well as lots of fun? The back-and-forth motion of a swing is an example of a pendulum. We see pendulums in ...

Once upon a time, you were probably on an elementary school field trip at a science museum or an observatory. Just before lunch, your teacher had the class stand in a circle around an enormous weight ...