if aliens do exist they have never reached earth it would take too long and the speed of light cant be broken
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Who says they're aren't any aliens in our own solar system? Humans are an extremely young race. Hell, Earth is an extremely young planet compared to other bodies in the universe. So who's to say that aliens have devoloped technology to travel faster than the speed of light. Just cause WE don't have the technology, doesn't mean its out of the question. You say time is a human concept, well then on that notion, so is the speed of light.