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As discussed in another thread I started yesterday, the universe is HUGE, in terms of space and time.
What if it is so huge, that perhaps, a civilization might not have enough time to travel and discover the remnants of another? By the time they would, the evidence of this other civilization might have already disappeared.
This begs the question: Can Xenoarchaeology exist without time travel? Is time travel mandatory, to find traces of alien civilizations in the far reaches of the cosmos?
What if it is so huge, that perhaps, a civilization might not have enough time to travel and discover the remnants of another? By the time they would, the evidence of this other civilization might have already disappeared.
This begs the question: Can Xenoarchaeology exist without time travel? Is time travel mandatory, to find traces of alien civilizations in the far reaches of the cosmos?