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[LotharGR]

Ion engines aren't science fiction... they do exist already. Sattelites use them only to make corrections to their routes ( because ion engines have limited thrust capabilities. ). But the warp-travel is completely another thing... Sadly, it may sound promising as a theory ( and actually, who knows, it may be right ), but its just that. A theory. It is supposed that the ship that enters warp speed, it creates a artificial "warm hole" and through that hole travels to wherever it wants. Problem is: how do you create a warm hole? It has been speculated that the ship must be able to create a gravitional field with the energy of the entire universe!. And it isn't only that. We do not know how the physical laws of our universe are altered inside the worm hole. The theory that a ship can go at light speed inside it is just a speculation. We really do not know what happens inside in those things.
It seems that faster-than-light speed is still a unreachable dream... and it will be as so for many many generations to come