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Re:Was there a civilization on Earth before humans? by peatmoss on Saturday April 14, 2018 @11:22AM (#16837680)
That was my thinking as well, though apparently geologists are pretty pessimistic about both the survival of human artifacts and the probability that someone would find the rare oddballs that did survive.

Plus, it’s possible that some hypothetical dino civilization mastered bio-degradable materials early on before taking to the stars ;-)

Re:Was there a civilization on Earth before humans? by y4mi on Saturday April 14, 2018 @12:07PM (#16837909)
and settled the ...delta quadrant it was iirc? :)
Re:Was there a civilization on Earth before humans? by rainbowmverse on Saturday April 14, 2018 @03:17PM (#16838917)
Just a misread of the data by a well-intentioned scientist and some meddling humans.
Re:Was there a civilization on Earth before humans? by nkrisc on Saturday April 14, 2018 @01:19PM (#16838278)
And now they're back, to reclaim what was once theirs.

Invasion of the Space Dinos!

Re:Was there a civilization on Earth before humans? by scarface74 on Saturday April 14, 2018 @07:08PM (#16840096)
Also reminiscent of an episode of Voyager where dinosaurs had evolved on earth millions of years before humans and started exploring space.

http://memory-alpha.wikia.com/wiki/Distant_Origin_(episode)

Re:Was there a civilization on Earth before humans? by SideburnsOfDoom on Saturday April 14, 2018 @02:04PM (#16838542)
Re:Was there a civilization on Earth before humans? by slavik81 on Saturday April 14, 2018 @07:13PM (#16840120)
"Dinosaurs on a Spaceship" was mildly disappointing given the amazing ridiculousness of the title, but "The Hungry Earth" / "Cold Blood" is a top-notch two-part episode. It feels so authentically human in both the highs and the lows.
Re:Was there a civilization on Earth before humans? by Udik on Saturday April 14, 2018 @04:53PM (#16839436)
How optimistic are geologists regarding the survival of bones? Or small insects?