It won’t ever happen at all.
Not because of the word intergalactic but because of the word we.
By the time humanity has achieved the capacity to travel between galaxies, it won’t be humanity any more. It will have engineered itself into something so different that it might not entirely recognize us as kin.
It’s like asking how far homo habilis is from helicopters. By the time helicopters came around, homo habilis was gone.
Read other answers by Ernest W. Adams on Quora:
- Why are space suits still bulky?
- How far are we from developing fully self-sufficient space stations?
- What would happen to the future of our space technology if NASA is suddenly hit by a big meteor and destroyed everything and killed all the brilliant scientists that we have?
from Quora http://ift.tt/2e2JJ8l
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