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Lt. Commander
Join Date: Dec 2007
Posts: 120
# 25
03-01-2011, 05:48 PM
Originally Posted by USS Parallax
Advanced civilizations would likely never limit themselves to living only on a small portion of the available land. The thing so would be ridiculous. That's like humans only living in California when everything else is available. They'd have cities around the globe.
This assumes they would expand around the Globe. Mankind has, but that doesn't mean all intelligent species do. Not to mention the fact that as we've expanded we've never had to deal with, say, Tyrannosaurs? I bet had the ancient explorers who "discovered" North America found Tyrannosaurs wandering about, they wouldn't have revisited, much less built colonies. Your assumption that all civilizations behave and prioritize like Humanities has is a bit Human-centric.

Originally Posted by USS Parallax
Not all of the earth has been destroyed by tectonic movements and the like.. Some of the earth has been untouched for millions of years. Yes, since the dinosaurs. It's impossible that all of the cities and stuff would be destroyed because not near all of the earth's land has.
Again, this assumes a world-wide civilization. Picture a civilization limiting itself to an area roughly the same size as South America. Imagine they decide to leave, all of them. Imagine how much of their civilization would be broken down and recycled for use in constructing the ships, now imagine nature having it's way for 30 million years or so with what remains.

Originally Posted by USS Parallax
Advanced civilizations will most likely NOT have houses made of mud but instead of steel and other metals which WOULD leave evidence on land. They wouldn't be in perfect shape or anything but there would be some minute amounts of evidence at least. Like globs of certain elements and mineral sand very specific patters. Ancient cities don't last long because they were made of mud, rocks and even grasses.
Steel rusts, the only evidence it would leave would be Iron-rich soil. Concrete becomes dust becomes sedimentary rock. Chemical process' break down artificial materials. Heck, even non-biodegradable materials (like plastics) break down from erosion and compression and chemical decay.

Everything we have of human settlements is, at most, twenty thousand years old. Who's to say what would become of our civilization after millions of years. That much time can break down nearly anything. Now, I'd bet there would be fossils of some of their creations, but even those would be so few and far between that we might not have any evidence of it.

In Trek canon, humanity went from stone knives and bear skins to warp propulsion in twenty thousand years. if the Voth evacuated Earth as soon as they could, or even hung around twice as long, that's a window of only forty thousand years they would be leaving any evidence of a technological civilization.

There are species of Dinosaur we have only partial skeletons of, and those individual examples are separated by millions of years. It's expecting to find evidence of a single species that only hung around inside 100 thousand years of a million year window that is implausible.