“The Universe is either traversable or it isn't. And if it is, it's not surprising that anyone's here. And if it isn't, we die here in short order.”
The real question is whether there’s theory beyond Einstein that allows us to visit different worlds. Chemical rockets won’t do.
Einstein locked us in the General Relativity prison.
Fastest engine for space travel with our current tech is nuclear pulse propulsion, just denonate atomic bombs behind the ship, which is actually 1960s tech. IIRC some studies suggested we could even achieve speeds above 10% of speed of light this way.
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