Would there be any way of knowing if dinosaurs had a civilization?
September 7, 2014 2:36 PM Subscribe
How would we know if dinosaurs (or some other species) achieved sentience and civilization millions of years ago? 65 million years is a long time, would a civilization with a, say, 10,000 lifespan even be noticeable in the geologic record? What if they only reached 19th century technology and didn't use nuclear power or plastic?