The world needs a new source of energy, an unspillable source.

How will we travel to the stars in the future?

There are a lot of exotic theories floating around for future star travel: ion drive (slow, but reliable); solar sails; laser propulsion; nuclear fusion drives. None of these are phony “Star Trek” warp drives (doesn’t make ANY scientific sense–they’d be crushed to death!), but which one is the most feasible?