It starts out as a hypothetical between a couple of researchers that resulted in a paper on the longest-lasting effects of human civilizations.
It's a good read, but the summary is that human civilization has resulted in atmospheric changes which will be detectable 100 million years from now, and we've got that much atmospheric evidence buried in geology without similar evidence for a past civilization.
It starts out as a hypothetical between a couple of researchers that resulted in a paper on the longest-lasting effects of human civilizations.
It's a good read, but the summary is that human civilization has resulted in atmospheric changes which will be detectable 100 million years from now, and we've got that much atmospheric evidence buried in geology without similar evidence for a past civilization.