I believe it's two orders of magnitude over that to maintain our current level of technology. Note that maintaining the technology also requires a certain market scale, or certain types of technology become prohibitively expensive to maintain or even attempt. I seem to recall Stirling posting some pretty comprehensive calculations on this for his "Island in the Sea of Time".
Yes, advanced civilizations leave traces. Which is why I had to use very special methods to wipe out the original Ancient Civilization in my own universe.
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I believe it's two orders of magnitude over that to maintain our current level of technology. Note that maintaining the technology also requires a certain market scale, or certain types of technology become prohibitively expensive to maintain or even attempt. I seem to recall Stirling posting some pretty comprehensive calculations on this for his "Island in the Sea of Time".
Yes, advanced civilizations leave traces. Which is why I had to use very special methods to wipe out the original Ancient Civilization in my own universe.