The average altitude is 4000 meters above sea level and it is there that the highest point on the globe ... landing could be ...

As you might have noticed from the globe's example, the string takes the shortest path, however, seeing it on a 2D world map makes it look distorted. Planes flying over Alaska are just a way to ...

Making a paper airplane that stays airborne for more than a few seconds is a challenge for most people. John Collins folds paper flying machines ... aircraft traveled over 289 feet in December ...