Escaping Earth. But suppose the goal is to let the rocket escape from Earth’s gravity forever so it can fly off into the depths of space. That’s when scientists do a neat trick called staging.

Idaho State University's Physics Department students taught the kids a little about physics and showed them how to build their own water-powered rockets.

Question: What’s the story behind the rocket at the state fairgrounds? The South Carolina State Fairgrounds is a wide swath of blacktop and cavernous buildings next to Williams-Brice Stadium ...