The limits of simulators are not in their capabilities, computer scientists will tell you again: anything is possible; they are rather in their effects. Learning to fly a plane on a simulator is one ...

An engineer's masterful grasp of physics, the properties and availability of various building materials, and construction techniques have made it possible to build modern bridges that carry heavier ...

This is an excellent spot for a beam bridge. Beam bridges typically span up to 250 feet, and they're also the cheapest and easiest bridges to build. Congrats -- you've just made a lot of rollerbladers ...