| > What aliens could find in a few tens of millions of years Much more than we are finding. The earth would be a mess with plenty of really puzzling events. Wild tomatoes with narcissus and flounder genes for example. Sudden extinction of entire groups of animals and plants in only a few thousands of years Radioactivity holes and missile holes fossilized with metals in the bottom Cities, and cemeteries in particular, would be a geological nightmare waiting for an explanation. A collection of grey granite from Canada carved in lames of uniform thick, polished for no reason and accumulated in a point. At 20 meters away another set of lames of Chinese black granite and 30 meters away a lot of yellow marble only known from Italy. All wrapped in asphalt, gravel, glass and concrete. Dumpsters would also be very strange places with plenty of plastics and chemicals that shouldn't be there. Gems also. Diamonds carved in impossible shapes all ending in a more or less conical tail in the whole planet. Lots of things shaped like a heart. Strange collections of elements with unique properties of the periodic table found always together: Mixed minerals found near, gold, silver and platinum, at tens thousands of Km far away from its known mines. As they are often saved in fireproof boxes, would had survived miraculously in burnt areas. Implants. Titanium fossils shaped like the femur of an animal (and always the same animal) and porcelain teeth would be enough to show a civilization and signal us in charge of it. |