Yes, but maybe not extraterrestrial. Perhaps from a civilization that thrived on Earth a hundred thousands ago, a million years ago, maybe even a billion years ago. One that may still exist somewhere today, hidden in the ice or under the seas.

Human life on Earth may have come and gone dozens of times, reaching who know's what level of technology. I mean how far back does human history go, 100,000 years? Actually a blink in time as we know it. Who's to say that a civilization that might have existed 100 million years ago couldn't have reached a level of technology way beyond what we have today? The Earth as we know it today has transformed many times. The poles have shifted, the continents have split and drifted, the oceans have expanded and receded how many times over the eons? We look at our current human evolution as the beginning of our species, and maybe it is or maybe it's not. What we know about our planet might only be a sentence or a paragraph out of a book with many volumes.

Far fetched maybe, but the subject and ideas would make one helleva book or movie.

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