We've all made paper airplanes at some point in our lives. Some flew great, others... not so much. In honor of National Paper Airplane Day, we found some great paper airplane and glider templates ...

Add Yahoo as a preferred source to see more of our stories on Google. At some point in everyone’s life—usually during a particularly dull moment in third grade—a plain white piece of paper inspires a ...

Unsure about a new design? Scientists and engineers often start with a model. With a model, you can test new ideas on a small-scale before going bigger. They are also cheaper, easier to produce, and ...