I was wondering is there any possibility of FTL technology being invented in the future or is it just science fiction?
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No it's completely disallowed by relativity. Anything that is travelling slower than the speed of light cannot accelerate to a speed faster than the speed of light, it's impossible. This idea is mathematically equivalent to asking, if I rotate a ruler enough, can I shrink its length to zero? The answer obviously being of course not, rotating doesn't change length.
The only possibility would be through wormholes, but even those are speculative and we have no evidence for their existence so far.
Arturo don Juan
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