Star Trek screenwriter Roberto Orci wades into the controversy over whether the Enterprise was built on Earth with a super-complicated explanation. Apparently if you're building a starship with simulated Earth gravity, it's best to construct it in the gravity well you're simulating. And warp travel is sort of similar to the pressure of gravity, so the best way to balance your warp nacelles is to build them in a planet's gravity well. Turns out the Trek writers obsess about this stuff even more than you do. [TrekMovie]